* If you don't have pets, pick family members (kids if you have them). * If you have an ultra-common name like John, stick to the most prominent Johns.
My two cats were named for video game cats, so...
Neko - Secret of Mana (duh), arguably OneShot and Grand Theft Auto IV (Niko) Ashes - Fallout IV, arguably Final Fantasy XII and Overwatch (Ashe)
If there are Neko games with a character named Neko, someone will have to enlighten me. I literally didn't know Neko meant cat when I named him.
Fire Emblem Three houses also has a character named Ashe.