double-cousin-nephew

Son of their maternal first cousin with the paternal first cousin or double-first cousin’s son.

My double-cousin-nephew is a good person.

sesqui-first great-cousin-nephew

Sesqui-first cousin’s grandson.

My sesqui-first great-cousin-nephew is a good person.

step-cousin-nephew

1. The grandson of one's parent's stepsibling.
2. The stepgrandson of one's parent's sibling.
3. The grandson of one's stepparent's sibling.

My step-cousin-nephew is a good person.

half-great-cousin-nephew

Half-first cousin’s grandson.

My half-great-cousin-nephew is a good person.

third great-cousin-nephew

Third cousin's grandson.

My third great-cousin-nephew is a good person.

second cousin-nephew

Second cousin's son.

My second cousin-nephew is a good boy.

sesqui-great-cousin-nephew

Sesqui-first cousin’s grandson.

My sesqui-great-cousin-nephew is a good person.