If there is no surviving spouse or children, generally, the half sister. You can check the laws of intestacy for your state at the related question link provided below.
Technically, the baby would be your half-niece or half-nephew, and you would be their half-uncle or half-aunt. But many people dislike the term half or step (I have two stepsons and one natural son) and only for official purposes would I use the term half or step. So I'm with C3 Shooter on this, treat them as your nephew or niece.
Your half-brother's daughter is your niece. Your niece and your son are first cousins to each other.
The site stripped the parentheses from the question. It should read: "What is the technical term for the familial relationship you'd have with your half-niece's (daughter of half-brother) son?" Your half-niece is your half-sibling's daughter. So what is the term for your half-niece's daughter, in relation to you? My first best guess would be "half-grandniece", but that doesn't sound right to me, and I guess it with absolutely zero authority. Hopefully someone can give the correct answer.
In many areas, no. The brother-sister co-sanguinity rule would apply, as the woman is your niece. 31 US states also ban first-cousin marriages, even those where simple incest is no longer criminalized among adults.
Your father's half sister is still your aunt because she has some of the same genes as your father. Call her Aunt _________.
The children are both your cousins[uncle's children]and your nephew and niece[sister's children].
If your brother-in-law is the husband of your sister, presumably his daughter is your sister's daughter, too. Then his daughter and your nephew are either brother and sister or first cousins. If the daughter is not your sister's daughter, but the child of a previous marriage, then she is could be the half-sister of your nephew or not related to your nephew at all. If your brother-in-law is the brother of your spouse, then his daughter is your niece and your niece and your nephew are either siblings, first cousins, or not related at all, depending on how your nephew is related to you.
Nothing............... kinda half sister though but not reli a blood relative Answer 2 tangled family? i totally understand. since you and your brother share one of the parents that adopted the little girl, she is your adopted half sister. send anyother family riddles my way!!
If your half-sister had a son that would be a half-nephew to you
Elijah and Grace Judd (Wynonna's children)
Your nephew's sister is your niece. Her son is your great nephew. Your nephew's sister might not be related to you if she is the child of a second marriage in which your sibling was not one of the parents. In that case, she is your nephew's half-sister and her son is not related to you either.
If your half-brother has a full sister, she is your half sister. If your half brother has a half sister, she may be your full sister, or she may not be related to you at all.