first great-great-great-cousin-nephew

First cousin's great-great-grandson.

My first great-great-great-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.

third great-cousin-nephew

Third cousin's grandson.

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

sesqui-great-cousin-nephew

Sesqui-first cousin’s grandson.

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

second great-great-cousin-nephew

Second cousin's great-grandson.

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

half-great-cousin-nephew

Half-first cousin’s grandson.

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

step-great-nephew

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

My step-great-nephew is a good person.