そうそふ【曽祖父】
one's great-grandfather
そうそぼ【曽祖母】
one's great-grandmother
そうそん【曽孫】
one's great-grandchild
そうゆう【曽遊】
曾遊の地を再び訪れたI went back to the places I had once visited in years gone by.
ひいおじいさん【▲曽お▲祖▲父さん】
a great-grandfather
ひいおばあさん【▲曽お▲祖▲母さん】
a great-grandmother
ひまご【▲曽孫】
a great-grandchild;〔男〕a great-grandson;〔女〕a great-granddaughter