1. The son of one's stepgrandchild.
2. The stepson of one's grandchild.
My step-great-grandson is a good person.
1- Stepgrandchild's son.
2- Grandchild's stepson.
step-great-grandson.
1- Stepchild-in-law's father.
2- Child-in-law's stepfather.
step-co-father-in-law.
1- Stepchild-in-law's father.
2- Child-in-law's stepfather.
1- Sibling's step-great-grandchild.
2- Stepsibling's great-grandchild.
My step-great-grandnibling is a good person.
1. The granddaughter of one's parent's stepsibling.
2. The stepgranddaughter of one's parent's sibling.
3. The granddaughter of one's stepparent's sibling.
My first step-cousin-niece is a good person.