In some cases the child takes the mother's surname as a middle name and the father's name as the family name.

VOA: special.2009.07.06

Now Milton explains that he has nothing now, of course, to show for his father's investment, but he will.

弥尔顿是在说他现在没有可以证明，他父亲投资的东西，但是他会证明的。

耶鲁公开课 - 弥尔顿课程节选

and it's a memorable thing to see that a mother or a father donates to a child.

看见一个母亲或者父亲给孩子捐赠，这很让人难忘。

挽救生命的工作 - SpeakingMax英语口语达人

Other people cannot see what I see whenever I look into your father's face, for behind your father's face as it is today are all those other faces which were his.

NPR: An Author's Companion in Rage, Exile and Return

That soldier is someone's son, someone's brother, someone's father.

CENTERFORSECURITYPOLICY: Sleeping alongside the enemy

It means the Queen and Duke of Edinburgh will miss Prince Harry's best man's speech and Michael Middleton's father-of-the-bride address.

BBC: Royal wedding: William greets fans ahead of wedding