о своём отце

about one’s father

→ о
phrase Rare #38,638
about one’s father Used when the father belongs to the subject of the sentence: his own father, her own father, your own father, etc.
RU: Он часто говорит о своём отце.
EN: He often talks about his father.

Том когда-нибудь рассказывал о своём отце?

Did Tom ever talk about his father?

Может, напишешь о своём отце?

Maybe you should write about your father?

— Пылающий (2018)

Не говори так о своём отце!

Don't talk about your father like that!

— Тумбад (2018)

Мэри рассказывала о своём отце.

Mary talked about her father.