Matilda Fitzroy (c. 1080/1100 – 25 November 1120), Countess of Perche, was among several members of the English royal family who died in the wreck of the White Ship off Barfleur.
[3] She was identified as his daughter by Orderic Vitalis, who added that the king built up her husband's power by greatly augmenting his estates and wealth in England.
[7] Rotrou was a direct vassal of King Henry in England, where he held fiefs jure uxoris, in right of his wife.
In the wreck of the White Ship, the evening of 25 November 1120, William of Malmesbury noted the fate of the countess: "the water having washed some of the crew overboard and entering the chinks drowned others, the boat was launched, and the young prince getting into it might certainly have been saved by reaching the shore, had not his illegitimate sister, the countess of Perche, now struggling with death in the larger vessel, implored her brother's assistance, shrieking out that he should not abandon her so barbarously.
Touched with pity, he ordered the boat to return to the ship, that he might rescue his sister; and thus the unhappy youth met his death through excess of affection; for the skiff, overcharged by the multitude who leaped into it, sank, and buried all indiscriminately in the deep."