his grandmother; her grandmother
Sa mère est morte quand il était jeune et sa grand-mère l'a élevé.
His mother died when he was young, and his grandmother raised him.
Mais sa grand-mère est un quart italienne.
But her grandmother is one-quarter Italian.
— Porco Rosso (1992)
Marie visite sa grand-mère.
Marie is visiting her grandmother.
Tu vas chez sa grand-mère habillée comme ça ?
Are you going to her grandmother's house dressed like that?
— Crazy Rich Asians (2018)
C'est tout le portrait de sa grand-mère.
They look exactly like their grandmother.
— Manon des sources (1986)
Elle va rendre visite à sa grand-mère samedi.
She is going to visit her grandmother on Saturday.
His grandmother.
Ziri a remercié sa grand-mère.
Ziri thanked her grandmother.