祖父が

grandfather

→ 祖父
phrase Rare #36,730
grandfather 祖父 means “grandfather,” and が marks him as the subject of the sentence. Depending on context, 祖父 can mean “my grandfather” or “someone else's grandfather.”
JA: 祖父がこの写真を撮った。
EN: My grandfather took this picture.

トム祖父が乗っていた船は魚雷により沈没した

The ship Tom’s grandfather was aboard was sunk by a torpedo.

私は祖父が死んだ年に生まれた

I was born in the year my grandfather died.

この腕時計祖父が私に残してくれたものだ

This watch was left to me by my grandfather.

祖父が会社を今日ある姿にした

My grandfather built the company into what it is today.