Baby name help

I’m having another boy. I have names picked out if I were to ever have two girls, but boy names have been hard for me. My first son is Aiden. The only other name I sorta like is Rex, but I’m unsure. I feel like the name didn’t fit my first son, so I’m not sure if it will fit this next one. It’s not a crazy name, but also not very common and some people may consider it more of a dog name. I’m kinda curious what other people think of it. Also, what other suggestions do you have for boy names that you love? I’m just struggling finding a name I love.