sesqui-cousin 

A child of a parent's half-sibling with the other parent’s full sibling; the relative who has with the other person only three grandparents in common, but parents are different.

My sesqui-cousin is a good person.

sesqui-cousin by Usery May 2, 2021

sesqui-cousin 

Child of their parent’s half-sibling with the other parent’s full sibling. Has among themselves; different two parents, three grandparents in common and different one grandparent.

My sesqui-cousin is a good person.

sesqui-cousin by Usery May 2, 2021

half-second-cousin 

Half-2C:
1- Parent's half-first-cousin's child.
2- Grandparent's half-sibling's grandchild.
3- Person who, in relation to the other person, has zero parents, zero grandparents and one great-grandparent in common.

My half-second-cousin is a good person.

half-second-cousin by Gerald128 May 15, 2021

double-second-cousin 

Double-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and four great-grandparents in common.

My double-second-cousin is a good person.

double-second-cousin by Gerald128 May 15, 2021

sester-second-cousin 

Sester-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and five great-grandparents in common.

My sester-second-cousin is a good person.

sester-second-cousin by Gerald128 May 15, 2021

triple-second-cousin 

Triple-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and six great-grandparents in common.

My triple-second-cousin is a good person.

triple-second-cousin by Gerald128 May 15, 2021

sesqua-second-cousin

Sesqua-2C:
Person who, in relation to the other person, has zero parents, zero grandparents and seven great-grandparents in common.

My sesqua-second-cousin is a good person.

sesqua-second-cousin by Gerald128 May 15, 2021