great-cousin-nephew

First cousin's grandson.

My great-cousin-nephew is a good boy.

great-great-great-cousin-nephew

First cousin's great-great-grandson.

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

double-great-cousin-nephew

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

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

first great-cousin-nephew

First cousin's grandson.

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

sesqui-cousin-nephew

Sesqui-first cousin’s son.

My sesqui-cousin-nephew is a good boy.