half-first cousin-nephew

Half-first cousin's son.

My half-first cousin-nephew is a good boy.

first-cousin-once-removed

1- Parent's cousin.
2- Cousin's child.

My first-cousin-once-removed is a good person.

first-cousin-once-removed

1- Parent's first-cousin.
2- First-cousin's child.

My first-cousin-once-removed is a good person.

first-cousin-once-removed

1- Grandparent's sibling's child / Parent's first-cousin.
2- Parent's sibling's grandchild / First-cousin's child.

My first-cousin-once-removed is a good person.

first-cousin-once-removed

1- Parent's cousin.
2- Cousin's child.

First-cousin-once-removed.

sesquiple-first-cousin

1- Child of their parent’s sibling with the other parent’s half-sibling.
2- Person who, in relation to the other person, has zero parents and three grandparents in common.
3- Sesquiple-cousin.
4- Sesquiple-1C.
5- Sesqui-first-cousin.
6- Sesqui-1C.

My sesquiple-first-cousin is a good person.

first co-cousin-nephew-in-law

The grandson-in-law of one's parent-in-law's sibling.

My first co-cousin-nephew-in-law is a good person.