I wouldn't suggest doing that.. That person is family.
He's your 2nd cousin
She would be your 2nd cousin.
your 2nd cousin, or maybe your 2nd cousin once removed.
2nd cousin or 2nd cousin in law.
Your mother's 1st cousin's child is your 2nd cousin.
2nd cousin once removed
Your cousin's cousin could either be your cousin or no relation at all.
You and your second cousin's son are second cousins, once removed, to each other.
2nd cousin once removed
He is of relation as a cousin-in-law.
Well, your cousin's brother is also your cousin, and a cousin's son is also your cousin.
Your cousin. You are that person's second cousin.