ok ones i have used lets see humm
nug nug ...owl
mr floppy ears ...rabbit
petey....an owl bear shadowrift in ravenloft was so odd
zelbren..snake
cotten...cat
and who can forget vinny the wearel lol
just a few lol
That's what the familiars of most wizards I've seen were called...eventually.
It's a pseudodragon - those little guys are equal in size to a Great Red Wyrm Dragon Ascendant, at least in ego. That thing needs a long, draconic name, and make sure it reminds everyone of its name regularly.
Kye'Ra-loni'maxa-ran or something. You can always shorten that to Kye, much to your familiar's annoyance. After all, you don't call someone who single-handedly wrestled Tiamat down "Kye". He did wrestle down Tiamat, single-handedly, you know.