ひおじいさんじゃなかったです
曾おじいさんじゃなかったです
hiojiisanjanakattadesu

Noun
Desu Copula

The polite, past negative form of ひいおじいさん

1. Wasn't my grandfather.; Wasn't an old man (like a grandfather).

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana