Nihoner

“Founder of a family line” in Japanese

Short answer
元祖 ganso がんそ

Founder of a family line in Japanese is “元祖” (ganso). Full meaning: originator, pioneer, inventor, founder; progenitor, primogenitor, founder of a family line.

Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.