YOU SAID:

I had a cat called Mayo, i lost him in my grandparents house.

INTO JAPANESE

私はMayoと呼ばれる猫を持っていた。私は祖父母の家で彼を失った。

BACK INTO ENGLISH

I had a cat called Mayo. I lost him at the grandparents' house.

INTO JAPANESE

私はMayoと呼ばれる猫がいました。私は祖父母の家で彼を失った。

BACK INTO ENGLISH

I had a cat called Mayo. I lost him at the grandparents' house.