when Z learned to talk, he said Poppa first.
I think there were even a few other words spoken before he finally got around to Mama. But it was Mama, for years, & i LOVED it.
somewhere over the past year, it transitioned into Mom, which i wasn't happy about.
(Poppa also transitioned into Dad, also frowned upon.)
So we've had talks about what we are to be called, Poppa & Mama.
Lately though, i've been called "MowMow" what that is or how it was derived i have no idea. He's also said PowPow a few times.