quadruple-third-cousin

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

Quadruple-third-cousin.

double-second-cousin

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

Double-second-cousin.

quindecuple-fourth-cousin

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

Quindecuple-fourth-cousin.

quintuple-fourth-cousin

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

Quintuple-fourth-cousin.

irregular-octuple-third-cousin

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

Irregular-octuple-third-cousin.

irregular-sextuple-third-cousin

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

Irregular-sextuple-third-cousin.

half-cousin

1- Half-pibling's child.
2- Someone who, in relation to others, has zero parents and one grandparent in common.

Half-cousin.