He is your step son.
There is none.
Yes, by a previous marriage.
If you are the current spouse of someone with children from a previous union, they can be called stepchildren, stepchild, step daughter or step son.
No! He has a son from his previous marriage.
No. He has a son from a previous marriage.
He would be a nephew, unless of course he is a son from a previous marriage, then he would be no relation.
Either a step-nephew or a son. "Step-nephew" is not a widely accepted or used relationship term but implies that someone's sibling has married a person who has a son from a previous marriage. That son is the step-son of the uncle's sibling, if the sibling is the person who is involved in the marriage. Otherwise the uncle has more than one sibling and you have another step-nephew relationship.
Yes, she has a son and a daughter from a previous marriage, and has William "Cash" with Chris Powell.
A stepson is the son of your spouse by another previous marriage partner or other relationship. This child is not related to you by blood.
Juelz Knowles is Beyonce's Nephew! (Which is her little sister Solange Knowles son from her previous marriage)
Greg Brady was the oldest son, but he was Mike's son. Carol only had daughters from her previous marriage and Mike only had sons.