Line of Descendancy from King Edward I of England to Mamie Eisenhower ..1 King Edward I of England (1239 - 1307) .. + Princess Alianore de Castile (1240 - 1290) ....2 Joan Plantagenet (1272 - 1307) .... + Sir Gilbert de Clare (1243 - 1295) ......3 Margaret de Clare (1292 - 1342) ...... + Sir Peter de Gaveston (ca. 1284 - 1312) ........4 Amy de Gaveston (after 1312 - ) ........ + John de Driby ( - after 1357) ..........5 Alice de Driby (ca. 1340 - 1412) .......... + Sir Anketil Mallory (1298 - 1393) ............6 Margaret Mallory ............ + Sir Robert Moton ..............7 Alice Moton (1405 - ca. 1445) .............. + William Basset (ca. 1403 - ) ................8 William Basset (1436 - 1498) ................ + Joan Byron (1429 - ) ..................9 William Basset (1464 - ) .................. + Elizabeth Meverell (1507 - ) ....................10 Anne Basset .................... + Thomas Alsop ......................11 Anne Alsop ...................... + John Alsop ........................12 Anthony Alsop ........................ + Jane Smith ..........................13 John Alsop .......................... + Temperance Gilbert ............................14 Elizabeth Alsop ............................ + Richard Baldwin (1622 - 1665) ..............................15 Sarah Baldwin .............................. + Samuel Riggs ................................16 Ebenezer Riggs ................................ + Lois Hawkins ..................................17 John Riggs .................................. + Hannah Johnson ....................................18 John Riggs Jr. .................................... + Abigail Peet ......................................19 James Riggs ...................................... + Sarah Clark ........................................20 George Riggs ........................................ + Phebe Caniff ..........................................21 Maria Riggs .......................................... + Eli Doud ............................................22 Royal Houghton Doud ............................................ + Mary Cornelia Sheldon ..............................................23 John Sheldon Doud .............................................. + Elivera Mathilda Carlson ................................................24 Mamie Geneva Doud ................................................ + Dwight David Eisenhower ..1 King Edward I of England (1239 - 1307) [again] .. + Marguerite de France (1279 - 1317) ....2 Sir Thomas Plantagenet (1300 - 1338) .... + Alice de Hales ( - after 1326) ......3 Margaret Plantagenet (ca. 1320 - 1399) ...... + Sir John de Segrave (ca. 1315 - 1353) ........4 Elizabeth de Segrave (1338 - 1376) ........ + Sir John de Mowbray (1340 - 1368) ..........5 Alianor de Mowbray (1364 - before 1417) .......... + Sir John de Welles (1352 - 1421) ............6 Eudo de Welles ( - before 1421) ............ + Maud de Greystoke ..............7 Sir Lionel de Welles (1406 - 1461) .............. + Joan de Waterton ( - after 1434) ................8 Cicely de Welles ................ + Sir Robert Willoughby ( - 1465) ..................9 Sir Christopher Willoughby (1453 - ca. 1498) .................. + Margaret Jenney ( - 1516) ....................10 Margaret Willoughby .................... + Sir Thomas Tyrrell ......................11 Anne Tyrrell ...................... + Sir John Clere ........................12 Sir Edward Clere ........................ + Frances Fulmerston ..........................13 Anne Clere .......................... + William Gilbert ............................14 Temperance Gilbert ............................ + John Alsop ..............................15 Elizabeth Alsop .............................. + Richard Baldwin (1622 - 1665) ................................16 Sarah Baldwin ................................ + Samuel Riggs ..................................17 Ebenezer Riggs .................................. + Lois Hawkins ....................................18 John Riggs .................................... + Hannah Johnson ......................................19 John Riggs Jr. ...................................... + Abigail Peet ........................................20 James Riggs ........................................ + Sarah Clark ..........................................21 George Riggs .......................................... + Phebe Caniff ............................................22 Maria Riggs ............................................ + Eli Doud ..............................................23 Royal Houghton Doud .............................................. + Mary Cornelia Sheldon ................................................24 John Sheldon Doud ................................................ + Elivera Mathilda Carlson ..................................................25 Mamie Geneva Doud .................................................. + Dwight David Eisenhower