Dad- Aboo/Dad/Daddy
Dad's Sister- Fuppi
Dad's Younger Brother- If he had one, Chachu
Dad's Older Brother- ^ Same as above
Older Sister- Her name and then Apu
Older Brother- His name and then Bhaiyya
Mom's Sister- Khalamoni
Mom's Brother- Mama
Mom's Mom & Dad- Nani & Nana
Dad's Mom & Dad- Dadi & Dada
Mom's Grandma/Grandpa- I would have called them Boro Nani/Boro Nana
Dad's Grandma/Grandpa- Boro Dadi/Boro Dada
Dad's Sister's Husband- Fuppa
Mom's Sister's Husband- Khalu
Mom's brother's Wife- Mami
Dad's Brother's Wife- If he had one, Chachi
Or maybe that's just how all Bengalis do it 😊