elder, oldest (female)
Sa sœur aînée s'est mariée le mois dernier.
His older sister got married last month.
His eldest daughter got married.
Ma fille aînée si, mais à mon âge.
My eldest daughter does, but at my age.
— Une journée particulière (1977)
I don't have an older sister.
She's the eldest, Miss Larkins.
— L'Histoire personnelle de David Copperfield (2019)