Is your half brothers cousin related to you?

Answer 1

Your cousin's half-brother may or may not be related to you. Your cousin has two parents, only one of whom is related to you (i.e. is the sibling of one of your parents). You cousin and his half-brother have only one parent in common. If the half-brother is the child of you parent's sibling, then the half-brother is related to you and is your cousin, too. If the half-brother is not the child of your parent's sibling, then he is not related to you at all.

Answer 2

There is no relationship category of "half-cousin." There are half-brothers and half-sisters because the sibling relationship requires two parents in common. When only one parent is in common, their offspring are called "half-" The cousin relationship, on the other hand, requires only one connection. Your First Cousin is the child of one of your parent's siblings. So, if you have a Cousin who is the child of the sister of your father, and your father also had a brother, that brother is your cousin's uncle and is also your uncle. However, your cousin may also have an uncle who is the child of her father, rather than her mother. That uncle is not your uncle, and is not related to you at all. If your uncle has children by two different marriages, all those children are your cousins, regardless of who their mother is. If the wife in that second marriage also had children from a previous marriage, none of them are your cousins in the strictest sense. If you really like them and want to consider them family, of course there is nothing preventing you from calling them "cousins", too. But "half-cousin" has no meaning. If you want something other than "cousin" try "step cousin" as their mother would be Step-mother to your uncle's children from his first marriage.

Answer 3

Those of your half-brother's cousins who are his cousins through the parent you share are also your cousins and related to you. Your half-brother also has cousins through his parent who is not also your parent, and those cousins are not related to you.

Answer 4

No, because you share no ancestors. However some people like to say he would be your uncle-in-law.