Was sick of my 'unprofessional' username 'Outputt' everywhere. I picked that because there was someone I thought who was cool called 'Outdated' on Furcadia when I was a baby teen and you do dumb things like get a similar name.
Anyway, I think it's obvious that it's a pun on Sketchbook, but deer.
Sketchbuck
I randomly came up with it 20ish years ago and it became my perma pen name
Keri worked for before I realised i was enby
Then became Kerry (unisex name!)
But am still Kerijiano
