Shelley 
A monument to Robert Shelley (died 1420) existed 
in church of 
St Dunstan-in-the-East,
 London,
as at 1603.
But after the Great Fire of London and WW2, it no longer survives today.
From 
A Survey Of London  (1603) 
by 
John Stow.
Above is from 
p.134
of
vol.1
of 1908 edition. 
Sir William Shelley,
had issue:
  Robert Shelley.
He mar Elizabeth Petit [dau of John Petit]. 
He died 1420.
 
He was  bur in church of St Dunstan-in-the-East,
City of London.  
Robert and Elizabeth
had issue:
- 
John Shelley. 
 
  
 
 Is the above John Shelley the father of John Shelley of  Michelgrove? 
[Hutchinson, 2008] 
says the above John Shelley is  the father of our John Shelley of  Michelgrove
below.
But  there are issues with this.
Hutchinson
identifies the above  John with 
John Shelley,  
MP for 
Rye
in 1410s and 1420s. 
But those dates seem too early, 
and the information does not match the entry for
John Shelley, MP for Rye in
The History of Parliament: the House of Commons 1386-1421, ed. J.S. Roskell, L. Clark, C. Rawcliffe., 1993.
 
Hutchinson also 
says the above   John 
married  Beatrice Hawkwood, dau and heiress of the mercenary
 
Sir John Hawkwood (died 1394).
But again the dates seem too early.  
 
  
 
We start with (possibly son of the John above):
- 
 John Shelley.
 
Married in 1474.
Acquired 
 Michelgrove,
 Sussex, by marriage. 
 
 References 
  
 Sources yet to be consulted