nephew
"Mi'Jo" is a portmanteau of the Spanish words "mi" (my) and "hijo" (son). It is used as a term of endearment to refer to someone as "my son" or can be used colloquially to address someone in a friendly way, similar to saying "buddy" or "pal."
Nephew.
my brother doesn't have a son.
Your son would be the uncle of his brother's son.
It was a derogatory term used [by pirates] to describe a bastard son of a sailor.
He had three brothers; he was the oldest son.
A brother's son is referred to as a nephew.
Great uncle / Great nephew
The son(s) of your parents.
Nephew...
Nephew.
The term "son-in-law" originated in the late 14th century and comes from Middle English, where "son" referred to a male child or descendant, and "law" signified a legal relationship. Thus, a son-in-law is legally connected to his spouse's parents through marriage.