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father's side of family
paternal (grandfather, uncle, etc.)
父方の祖父は京都で生まれた。
My paternal grandfather was born in Kyoto.
彼女は父方からえくぼを遺伝した。
She inherited her dimples from her father's side.
お正月には父方の親戚が集まるのが恒例だ。
It's customary for the paternal relatives to gather for New Year's.