Word

お祖母さん

お婆さん、御祖母さん、御婆さん
おばあさん
grandmother; female senior-citizen
Word

お祖父ちゃん

おじいちゃん
grandpa; granddad
Word

先つ祖

さきつおや
ancestor
Word

始祖鳥

しそちょう
Archaeopteryx; extinct genus of early birds
Word

先祖の位牌

せんぞのいはい
ancestral tablet
Word

先祖伝来

せんぞでんらい
inherited; family (heirloom); ancestral
Word

先祖伝承

せんぞでんしょう
what has been (orally) handed down from generation to generation; legend; folk tale
Word

先祖代代

先祖代々
せんぞだいだい
ancestral; hereditary; generation after generation; passing from father to son
Word

最も近い共通祖先

もっともちかいきょうつうそせん
most recent common ancestor
Word

爺ちゃん

祖父ちゃん
じいちゃん
grandfather (may be used after name as honorific); male senior-citizen (may be used after name as honorific)