We only get rescues now, so we keep whatever name they come with. Sometimes we shorten it. Our current Chihuahua/Beagle mix, her shelter name was Chimichanga. We shortened it to "Chimi."
Our first dog as a couple was a Scotty/Schnauzer we got as a pup. We called him Angus, or "Ang" for short. He was a terrific dog. Died way too young.
My only dog growing up was terrier mix. We called her "Kukla" from the puppets on the Ed Sullivan Show Kukla, Fran & Ollie. My mom was Russian and Kukla means doll.