Aianhāto Hachidai

Trivia
His surname Hachidai,(八大),is a combination of the words "eight" and "greats",which references the fact that he's the 8-greats grandfather of Tesshin.

His first name Aianhāto,(アイアンハート),is a combination of the words "iron" and "heart",which references the facts that he cared for Tesshin throughout his life.