As children, we always called our rabbits animal names - Fluffy, Snowy, Sooty, Cheeky, Smokey.... all those "y"'s
Years later met a woman who called hers (and she had about sixty) names like Michael, Tina, Quentin, Nancy, Henry. There was a Pumpkin but that kind of name was in the minority.
It was well weird, "Oh look, Nancy's humping Tina!", "Gross, that's her mother.." It was so odd for me to hear animals called people names.
I knew horses called Penny, Holly, Molly, Shane, Teddy, Shaun, Dawn, Crystal.
We called our Siamese Fighting Fish, Miranda and Ferdinand. The Dwarf Gourami pair were Marvin and Clara. The Chocolate Gouramis, however, we called Itsy and Bitsy. I forget most, but I remember one of the the striped loaches was called Colin.
Colin does seem a popular name for animals, maybe it seems particularly ironic.