The boy's aunt and uncles and cousins on their dad's side.  

The boys dad and siblings when they were kiddo's. 

I hate that Mark died and left me with 3 young boys.  These boys needed their dad.  I wish that he could see the boys today.  I think he would be proud of how they have turned out.  Trevor has quite a few of Mark's characteristics.  Aaron has a lot of his dad's facial expressions.