his/her/their cousin
El padre de Geeta y Babita Kumari y su primo cercano.
Geeta and Babita Kumari's father and their close cousin.
— Dangal (2016)
Así fue como mi pobre mamá abrazó por primera vez a su primo Jan.
That was how my poor mom hugged her cousin Jan for the first time.
— Die Blechtrommel (1979)
Tom se va a quedar con su primo durante la Navidad.
Tom is going to stay with his cousin during Christmas.