FitzRoy was the son of Francis Horatio FitzRoy ( 1823–1900 ) , the grandson of Rear Admiral Lord William FitzRoy and the great - grandson of Augustus FitzRoy , 3rd Duke of Grafton .
Head entity: lord william fitzroy Q16230330 17 18 19
Tail entity: augustus fitzroy, 3rd duke of grafton Q312583 26 27 28 29 30 31 32
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22