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There is no relationship of "quarter cousin." If you have a first cousin, your son and that first cousin are first cousins, once removed. If you have a second cousin, your son and the second cousin are second cousins, once removed. Whatever cousin you have, your son and that cousin are the same kind of cousins, once removed.
What else can I help you with?
What is the relation named with the son of your cousin brother?
Well, your cousin's brother is also your cousin, and a cousin's son is also your cousin.
What relation to you is your mother's first cousin's son?
Your mother's cousin's son is your second cousin.
What relation is my cousin's son?
It's your second cousin (:
Your relation to mom's third cousin's son?
The son of your mother's third cousin is your fourth cousin.
What is your mum's cousin's son in relation to you?
He's your 2nd cousin
What relation is your first cousin to your son?
Cousin once removed.
What relation is your second cousin to your son?
Your second cousin and your son are second cousins, once removed.
What relation is uncle's son?
Your Uncle's son is your first cousin.
What relation would your son be to your cousin?
First cousin, once removed. Second cousin
What relation is your nieces son to you?
Second Cousin
What relation is your grandfathers sisters son to you?
cousin
What relation is your nephew to your son?
Cousin brother
