| |  1340 - 1407  (67 years) 
 
 
 
	
Generation: 1
Generation: 2
 Generation: 3
| 3. | Sibilla was born in 1316 in England. | 
 
 Generation: 4
 Generation: 5
 Generation: 6
| 17. | Joan Gerard | Children: 
 
8. Robert de Heydon was born in 1260 in Woodbury, Devonshire, England; died in 1323 in Woodbury, Devonshire, England.  | 
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 Generation: 7
| 33. | Isabel More | Children: 
 
16. 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.  | 
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 Generation: 8
 
| 129. | Mrs. Hidden was born about 1161 in Northumberland, England. | Children: 
 
64. Thomas de Heydon, Jr. was born in 1185 in Heydon, Norfork, England; died in 1250 in Heydon, Norfork, England.  | 
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