SiSi means yes in Spanish. Do you like this pet name? Si. Si.SiamThailand was formerly known as Siam. Take your pet to the far East with this exotic pet name.SidIf you're looking for a male pet name that begins with S and contains three or less characters, consider this one!SidneyThink about the pet name Sidney. We think you'll like it!SiennaName your pet after a crayon (hey, it's more catchy than cerulean).SierraWhat's not to love about the pet name Sierra? We like it!SilkDoes your pet's fur (or feathers) feel like silk? If not, you're not doing enough to make it feel that way! Wash it! Brush it! Step it up!SilkyWarning- this pet name is for soft, touchable pets only! (Forget this name for your pet porcupine!)SillyLol. We love this pet because it just makes us laugh!SilverGiving your pet the name Silver is the kind way of telling it that he or she is getting old.Silver MoonThis name is quite mystical-sounding to us. Especially great for a horse.SilverHawkThis is one of those rare pet names that works well for a horse as well as a bird.SimbaSimba was the protagonist lion in 'The Lion King'. Can your pet live up to such a powerful name?SimonIf you sing to your pet and they never seem to appreciate your vocal talent, you might want to give them this pet name!SimoneThose looking for a cool pet name need not look further than the name Simone. Your pet will love you!