second great-great-cousin-nephew

Second cousin's great-grandson.

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

half-first cousin-nibling

Half-first cousin's child.

My half-first cousin-nibling is a good person.

irregular-double-fourth-cousin

Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and three great-great-great-grandparents in common.

Irregular-double-fourth-cousin.

ninth-cousin-9X-removed

Ninth-cousin-nine-times-removed (9C9R).

My ninth-cousin-9X-removed is a good person.

half-cousin-nibling

Half-first cousin's child.

My half-cousin-nibling is a good person.

sesqui-first great-cousin-nibling

Sesqui-first cousin’s grandchild.

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

quintuple-third-cousin

Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents and ten great-great-grandparents in common.

Quintuple-third-cousin.