All the names listed below have something in common whether you call your father dad, pap, or pop, and names are included too, some are shortened, but can you find what all the names have in common?

Abba

Ada

Aja

Anna

Anona

Ava

Bob

Dad

Eve

Izzi

Hannah

Lil

Mom

Nan

Otto

Pap

Pop

Sis

Viv

Answer below

All the names spell the same name front wards or backwards.