There is no word in the English language for a relationship between grandmothers of related grandchildren
It's possible to have a half-brother who is a great guy... but you can't have a great-half-brother. The term "great" is reserved for ancestors or descendants, but not for siblings.
The son of your half-brother's father is not related to you when the father is not your father.
Oh, dude, let me break it down for you. Your half-brother's nephew is technically your half-nephew. I know, mind-blowing stuff, right? So, yeah, you two are related, but like, not super closely or anything.
BROTHER AND SISTER. Half brother and sister.
Your half-brother's half-sister could be your full sister, or not related to you at all. For example, say your parents are Joe and Mary and your half-brother's parents are Mary and Steven. Say your half-brother's half-sister is Barbara. If Joe and Mary are Barbara's parents, then she is your full sister and your half-brother's half-sister. If Barbara's parents are Steven and Jane, then Barbara is not related to you (unless there is an adoption).
he is supposed to be his half brother
Yes he was, he was Tupacs half brother.
Your grandfather's half brother is you great uncle. Some would insist on calling him your half-great uncle, but the English language has not had a need to get that specific and complex about such distant relationships.
Half-fourth cousins
Oh, dude, a brother's half brother would be a half-brother to the sister. It's like they share one parent but not both, so they're kind of related but not fully. Like, it's a half-sibling situation, so they're like family adjacent.
yes they are masons brother is mitchell and mileys half brother is trace