My first bub (ended in MMC) was Borgy, which sounds weird, but this was the convo:
Me: We need a nickname for the baby.
DH: Why?
Me: Well I can't keep calling it "it".
DH: So? <puzzled> (He was not quite awake, bless him!)
Me: So it needs a nickname, something to call it, a label, a designation.
DH: Designation? A little borg baby?
Me: Yes, like One-of-One or something.
DH: Then Borgy it shall be.
This one DH named Dinky. No particular reason, just cute lol. I might also have called it My Little Parasite now and again when I was feeling weak, sick and knackered in firsts tri, which DH didn't like, but I meant it with love!