+---Matrin Fortescue
| | +---John Jamys
| +---Isabella Jamys 
+---John Fortescue
| | +---Richard Deynsell
| +---Elizabeth Deynsell
+---Bartholomew Fortescue
| +---Jacquet St Leger
+---Lewis Fortescue
| +---Ellen Moore
+---James Fortescue
| | +---Roger Gifford
| +---Wilmot Gifford
+---Achilles Fortescue
| +---Elizabeth Holworthie
Grace Fortescue (-1670)
| +---Andrew Luttrell
+---Prudence Luttrell
+---Prudence Abbot