Well..... mine came from one of my grandkids. I forget which one (of the 8)
but it was an earlier one, cuz I've been using it for a while.
I was given a compliment for something I'd done, maybe it was sing a song
or maybe it was after opening a present, but I was told
"Zada.... that's 'nide' (meaning 'nice').
Maybe the toddler had a cold, maybe it was just 'toddler speak' I dunno.
OH, BTW, "Zada" is Yiddish for grandfather. I just couldn't wrap my brain
around being a grandpaw (and called 'grandad, or paw,paw, or 'gramps', etc)
in my middle 40's, so I adopted the name that I called my maternal grandfather.
It seemed to soften the blow, somehow.
It seems that 4 letters was too short for web sites and I had to have
6 characters or more, so the '44 is my birth year, 1944 - hence 'nide44'.
It seems odd when others reply to my posts and call me 'nide' because
I do sign all of them with my real name "Bob B.",
and really prefer to be called Bob.