great-great

●Idioms, etc.

great-great grandson：玄孫（孫の孫） フルガム著 池央耿訳 『人生に必要な知恵はすべて幼稚園の砂場で学んだ』(All I Really Need to Know I Learned in Kindergarten ) p. 198

great-great-grandfather：おじいさんのおじいさん DictJuggler Dictionary

great-great-grandfather：おばあさんのおじいさん DictJuggler Dictionary

great-great-grandfather：高祖父 DictJuggler Dictionary

great-great-grandfather：祖父の祖父 DictJuggler Dictionary

great-great-grandfather：祖母の祖父 DictJuggler Dictionary

great-great-grandmother：おじいさんのおばあさん DictJuggler Dictionary

great-great-grandmother：おばあさんのおばあさんの DictJuggler Dictionary

great-great-grandmother：高祖母 DictJuggler Dictionary

great-great-grandmother：祖父の祖母 DictJuggler Dictionary

great-great-grandmother：祖母の祖母 DictJuggler Dictionary