..1 King Edward III of England (1312 - 1377)
.. + Philippa de Hainault (about 1314 - 1369)
....2 Sir John of Gaunt (1340 - 1399)
.... + Katherine de Roet (1350 - 1403)
......3 Sir John Beaufort (about 1372 - 1410)
...... + Margaret de Holand (1385 - 1429)
........4 Sir Edmund Beaufort (about 1406 - 1455)
........ + Alianor Beauchamp (1407 - 1467)
..........5 Eleanor Beaufort ( - 1501)
.......... + Sir Robert Spencer (about 1435 - after 1501)
............6 Margaret Spencer (about 1472 - )
............ + Thomas Cary (about 1460 - before 1536)
..............7 Mary Cary
.............. + Sir John Delaval (1498 - 1562)
................8 Sir John Delaval (1512 - 1572)
................ + Anne Ogle (1509 - )
..................9 Sir Robert Delaval (1542 - 1607)
.................. + Dorothy Grey (1554 - 1591)
....................10 Sir John Delaval (1590 - 1652)
.................... + Elizabeth Selby (about 1590 - )
......................11 George Delaval (1613 - 1694)
...................... + Margaret Grey (about 1633 - 1709)
........................12 Edward Delaval (1664 - 1744)
........................ + Mary Blake (1664 - 1711)
..........................13 Anne Delaval (1692 - 1765)
.......................... + Sir Ralph Milbanke (about 1685 - 1745)
............................14 Sir Ralph Milbanke (1725 - 1793)
............................ + Elizabeth Hedworth (1726 - 1767)
..............................15 Sir Ralph Milbanke (1748 - 1825)
.............................. + Judith Noel (1751 - 1822)
................................16 Anne Isabella Milbanke (1792 - 1860)
................................ + Sir George Gordon Byron (1788 - 1824)
..................................17 Ada Lovelace (1815 - 1852)
..........5 Margaret Beaufort (about 1437 - 1474)
.......... + Sir Humphrey Stafford (about 1424 - 1455)
............6 Sir Henry Stafford (1455 - 1483)
............ + Katherine Wydeville (before 1458 - 1497)
..............7 Anne Stafford (about 1493 - )
.............. + Sir George Hastings (before 1489 - 1544)
................8 Dorothy Hastings (about 1520 - )
................ + Sir Richard Devereux ( - 1547)
..................9 Sir Walter Devereux ( - 1576)
.................. + Lettice Knollys (1539 - 1634)
....................10 Dorothy Devereux
.................... + Sir Thomas Perrott
......................11 Penelope Perrott
...................... + William Lower ( - 1615)
........................12 Dorothy Lower (about 1608 - 1677)
........................ + Sir Maurice Drummond ( - 1642)
..........................13 Jane Drummond
.......................... + Charles Trevannion
............................14 John Trevanion
............................ + Barbara Berkeley
..............................15 Sophia Trevanion
.............................. + John Byron
................................16 Capt. John Byron
................................ + Catherine Gordon
..................................17 Sir George Gordon Byron (1788 - 1824)
.................................. + Anne Isabella Milbanke (1792 - 1860)
....................................18 Ada Lovelace (1815 - 1852)
......3 Joan Beaufort (about 1379 - 1440)
...... + Sir Robert de Ferrers (about 1373 - before 1396)
........4 Mary de Ferrers ( - 1458)
........ + Sir Ralph Neville (about 1392 - 1458)
..........5 John Neville (about 1416 - 1482)
.......... + Elizabeth Newmarch (about 1420 - )
............6 Joan Neville
............ + William Gascoigne ( - about 1463)
..............7 William Gascoigne ( - 1487)
.............. + Margaret Percy
................8 Margaret Gascoigne
................ + Sir Ralph Ogle ( - 1512)
..................9 Anne Ogle (1509 - )
.................. + Sir John Delaval (1512 - 1572)
....................10 Sir Robert Delaval (1542 - 1607)
.................... + Dorothy Grey (1554 - 1591)
......................11 Sir John Delaval (1590 - 1652)
...................... + Elizabeth Selby (about 1590 - )
........................12 George Delaval (1613 - 1694)
........................ + Margaret Grey (about 1633 - 1709)
..........................13 Edward Delaval (1664 - 1744)
.......................... + Mary Blake (1664 - 1711)
............................14 Anne Delaval (1692 - 1765)
............................ + Sir Ralph Milbanke (about 1685 - 1745)
..............................15 Sir Ralph Milbanke (1725 - 1793)
.............................. + Elizabeth Hedworth (1726 - 1767)
................................16 Sir Ralph Milbanke (1748 - 1825)
................................ + Judith Noel (1751 - 1822)
..................................17 Anne Isabella Milbanke (1792 - 1860)
.................................. + Sir George Gordon Byron (1788 - 1824)
....................................18 Ada Lovelace (1815 - 1852)
..................9 Dorothy Ogle (1511 - 1541)
.................. + Sir Thomas Grey (1509 - 1570)
....................10 Isabel Grey (1533 - 1582)
.................... + Sir Ralph Grey (about 1529 - 1654)
......................11 Sir Edward Grey (1550 - 1632)
...................... + Catherine le Strange (1552 - )
........................12 Edward Grey (1587 - 1658)
........................ + Margaret Widdrington (1591 - 1661)
..........................13 Margaret Grey (about 1633 - 1709)
.......................... + George Delaval (1613 - 1694)
............................14 Edward Delaval (1664 - 1744)
............................ + Mary Blake (1664 - 1711)
..............................15 Anne Delaval (1692 - 1765)
.............................. + Sir Ralph Milbanke (about 1685 - 1745)
................................16 Sir Ralph Milbanke (1725 - 1793)
................................ + Elizabeth Hedworth (1726 - 1767)
..................................17 Sir Ralph Milbanke (1748 - 1825)
.................................. + Judith Noel (1751 - 1822)
....................................18 Anne Isabella Milbanke (1792 - 1860)
.................................... + Sir George Gordon Byron (1788 - 1824)
......................................19 Ada Lovelace (1815 - 1852)
......................11 Dorothy Grey (1554 - 1591)
...................... + Sir Robert Delaval (1542 - 1607)
........................12 Sir John Delaval (1590 - 1652)
........................ + Elizabeth Selby (about 1590 - )
..........................13 George Delaval (1613 - 1694)
.......................... + Margaret Grey (about 1633 - 1709)
............................14 Edward Delaval (1664 - 1744)
............................ + Mary Blake (1664 - 1711)
..............................15 Anne Delaval (1692 - 1765)
.............................. + Sir Ralph Milbanke (about 1685 - 1745)
................................16 Sir Ralph Milbanke (1725 - 1793)
................................ + Elizabeth Hedworth (1726 - 1767)
..................................17 Sir Ralph Milbanke (1748 - 1825)
.................................. + Judith Noel (1751 - 1822)
....................................18 Anne Isabella Milbanke (1792 - 1860)
.................................... + Sir George Gordon Byron (1788 - 1824)
......................................19 Ada Lovelace (1815 - 1852)
......3 Joan Beaufort [again]
...... + Sir Ralph de Neville (about 1364 - 1425)
........4 Alainor Neville (about 1407 - 1472)
........ + Sir Henry Percy (1393 - 1455)
..........5 Sir Henry Percy (1421 - 1461)
.......... + Alianor Poynings (about 1422 - 1484)
............6 Margaret Percy
............ + William Gascoigne ( - 1487)
..............7 Margaret Gascoigne
.............. + Sir Ralph Ogle ( - 1512)
................8 Anne Ogle (1509 - )
................ + Sir John Delaval (1512 - 1572)
..................9 Sir Robert Delaval (1542 - 1607)
.................. + Dorothy Grey (1554 - 1591)
....................10 Sir John Delaval (1590 - 1652)
.................... + Elizabeth Selby (about 1590 - )
......................11 George Delaval (1613 - 1694)
...................... + Margaret Grey (about 1633 - 1709)
........................12 Edward Delaval (1664 - 1744)
........................ + Mary Blake (1664 - 1711)
..........................13 Anne Delaval (1692 - 1765)
.......................... + Sir Ralph Milbanke (about 1685 - 1745)
............................14 Sir Ralph Milbanke (1725 - 1793)
............................ + Elizabeth Hedworth (1726 - 1767)
..............................15 Sir Ralph Milbanke (1748 - 1825)
.............................. + Judith Noel (1751 - 1822)
................................16 Anne Isabella Milbanke (1792 - 1860)
................................ + Sir George Gordon Byron (1788 - 1824)
..................................17 Ada Lovelace (1815 - 1852)
................8 Dorothy Ogle (1511 - 1541)
................ + Sir Thomas Grey (1509 - 1570)
..................9 Isabel Grey (1533 - 1582)
.................. + Sir Ralph Grey (about 1529 - 1654)
....................10 Sir Edward Grey (1550 - 1632)
.................... + Catherine le Strange (1552 - )
......................11 Edward Grey (1587 - 1658)
...................... + Margaret Widdrington (1591 - 1661)
........................12 Margaret Grey (about 1633 - 1709)
........................ + George Delaval (1613 - 1694)
..........................13 Edward Delaval (1664 - 1744)
.......................... + Mary Blake (1664 - 1711)
............................14 Anne Delaval (1692 - 1765)
............................ + Sir Ralph Milbanke (about 1685 - 1745)
..............................15 Sir Ralph Milbanke (1725 - 1793)
.............................. + Elizabeth Hedworth (1726 - 1767)
................................16 Sir Ralph Milbanke (1748 - 1825)
................................ + Judith Noel (1751 - 1822)
..................................17 Anne Isabella Milbanke (1792 - 1860)
.................................. + Sir George Gordon Byron (1788 - 1824)
....................................18 Ada Lovelace (1815 - 1852)
....................10 Dorothy Grey (1554 - 1591)
.................... + Sir Robert Delaval (1542 - 1607)
......................11 Sir John Delaval (1590 - 1652)
...................... + Elizabeth Selby (about 1590 - )
........................12 George Delaval (1613 - 1694)
........................ + Margaret Grey (about 1633 - 1709)
..........................13 Edward Delaval (1664 - 1744)
.......................... + Mary Blake (1664 - 1711)
............................14 Anne Delaval (1692 - 1765)
............................ + Sir Ralph Milbanke (about 1685 - 1745)
..............................15 Sir Ralph Milbanke (1725 - 1793)
.............................. + Elizabeth Hedworth (1726 - 1767)
................................16 Sir Ralph Milbanke (1748 - 1825)
................................ + Judith Noel (1751 - 1822)
..................................17 Anne Isabella Milbanke (1792 - 1860)
.................................. + Sir George Gordon Byron (1788 - 1824)
....................................18 Ada Lovelace (1815 - 1852)
....2 Edmund Plantagenet (1344 - 1402)
.... + Isabella de Castile (1355 - 1393)
......3 Sir Richard Plantagenet (about 1376 - 1415)
...... + Anne Mortimer (1390 - 1411)
........4 Isabel Plantagenet (1409 - 1484)
........ + Sir Henry Bourchier (1409 - 1483)
..........5 Sir William Bourchier ( - 1471)
.......... + Anne Wydeville (about 1438 - 1489)
............6 Cecily Bourchier ( - 1493)
............ + Sir John Devereux (about 1464 - 1501)
..............7 Sir Walter Devereux (about 1491 - 1558)
.............. + Mary Grey ( - about 1538)
................8 Sir Richard Devereux ( - 1547)
................ + Dorothy Hastings (about 1520 - )
..................9 Sir Walter Devereux ( - 1576)
.................. + Lettice Knollys (1539 - 1634)
....................10 Dorothy Devereux
.................... + Sir Thomas Perrott
......................11 Penelope Perrott
...................... + William Lower ( - 1615)
........................12 Dorothy Lower (about 1608 - 1677)
........................ + Sir Maurice Drummond ( - 1642)
..........................13 Jane Drummond
.......................... + Charles Trevannion
............................14 John Trevanion
............................ + Barbara Berkeley
..............................15 Sophia Trevanion
.............................. + John Byron
................................16 Capt. John Byron
................................ + Catherine Gordon
..................................17 Sir George Gordon Byron (1788 - 1824)
.................................. + Anne Isabella Milbanke (1792 - 1860)
....................................18 Ada Lovelace (1815 - 1852)