What is your relationship to your brothers son?

Answer 1

Two people who have at least one grandparent in common are first cousins. Your son and your stepbrother's son may be first cousins, or may be unrelated. Even if they are unrelated that can call each other first cousins if they get on well together and want to do that.

Answer 2

Step Grandparent, unless your son adopts the boy

Answer 3

They share a common Grandparent. That makes them first cousins.

Answer 4

He is your nephew. You are his uncle or aunt.

Answer 5

Your children and the children of your first cousin are second cousins to each other.

Your children and the children of your second cousins are third cousins to each other.

Answer 6

You are their aunt or uncle. They are your nephew.

Answer 7

there is no relation between the two.

Answer 8

They are cousins.

Answer 9

First cousins once removed.

Answer 10

They are first cousins.