My loyal, best friend, a Golden Retriever, came already named: GRIFFIN. I’m told that means red haired one in Welsh. That was appropriate and it stuck, though I called him Griff. His spayed lady companion, a Border Collie bitch, came named TACKY. I thought that was tacky, so renamed her Tammy. She did not mind.
When our cat named MISSY had kittens we named them PUNKEN, for Pumpkin, and PUDGY, cause he was the fattest of the litter. Pudgy and Punkin committed incest and produced a litter one of whom we called BAT FACE, for obvious reasons
My Mom and Dad named their pets as they saw them. GYPSY because she wandered, and SNOOPER because he sniffed everything. Snooper was a Scottie and Dad described Gypsy’s breed as Curbstone Setter. In other words, a non-descript mixture. BOUNCER was a lively dancing boxer.
Their cats were THIS ONE and THAT ONE. I never knew which was which. Another was COMMON, a common domestic short hair Maybe it was for “come on”, I’m not sure.
But the most ridiculous pet name I’ve heard was that of dog owned by a medical student. He gave his dog the generic name for Mercurichrome. Imagine calling your dog in at night by shouting through the neighborhood, “Come home little DIBROMOXIMERCUIFLOURICENE.”