@darrleny_reyes, I'm in same boat I have 10 girl names and like 2 boy names still searching for middle names to be honest with you with my last child we didn't have a middle name till after she was born at the hospital

Mathias is one of my favs

If it were.me, I'd pick a good old fashioned boy name - a strong name. I chose Richard because a named our last son as a 3rd after hi a daddy but I always get compliments on his name being a good strong name