Tinkerbell is a great name, Nick XD
Personally I'm not the kinda person that ensures male pets are named with obviously-masculine or females with obviously-feminine names. I just pick a meaningful name that suits them. Serendipity is a children's book series I used to read as a kid, and its dictionary definition is something like "lucky occurrence". So Seren it is. Volga is the name of the longest river in Russia. I picked that because originally I was gonna call the little guy Virga - geographical term for "fake rain", as in rain that evaporates before it touches the ground because of the crazy high temperature. But Virga doesn't sound good in my native tongue. So when a similar name popped up in my Geography class, I was like "yup that's it!". Willow may sound like the "typical girl name", but it's really short for will-o-the-wisp, a mythical ball of light that leads lone travelers either to their demise or hidden treasures. I'm spilling the beans here but my next and last male is gonna be named after a butterfly species: Charaxes Cithaeron; Sith for short. So yeah, meaning first.