| |  1292 - 1351  (59 years) 
 
 
 
	
Generation: 1
Generation: 2
 Generation: 3
 Generation: 4
| 5. | Joan Gerard | Children: 
 
2. Robert de Heydon was born in 1260 in Woodbury, Devonshire, England; died in 1323 in Woodbury, Devonshire, England.  | 
 | 
 
 Generation: 5
| 9. | Isabel More | Children: 
 
4. John de Heydon was born in 1244 in Heydon, Norfork, England; died in 1294 in Heydon, Norfork, England. William de Heydon, Jr. was born in 1246 in Heydon, Norfork, England; died in 1307 in Heydon, Norfork, England.  | 
 | 
 
 Generation: 6
 
| 33. | Mrs. Hidden was born about 1161 in Northumberland, England. | Children: 
 
16. Thomas de Heydon, Jr. was born in 1185 in Heydon, Norfork, England; died in 1250 in Heydon, Norfork, England.  | 
 | 
 
 | 
 |