Definitions by Mr. Jacov

half-second cousin 

Grandparent's half-sibling's grandchild.

My half-second cousin is a good person.

half-second cousin by Mr. Jacov November 23, 2019

double-half-cousin 

Child of their parent’s half-sibling with their other parent’s half-sibling or the child of their mother's maternal half-sibling with mother's paternal half-sibling or the child of their father's maternal half-sibling with father's paternal half-sibling.

My double-half-cousin is a good person.

double-half-cousin by Mr. Jacov November 23, 2019

double-half-first cousin 

Child of their parent’s half-sibling with their other parent’s half-sibling or the child of their mother's maternal half-sibling with mother's paternal half-sibling or the child of their father's maternal half-sibling with father's paternal half-sibling.

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

double-half-first cousin by Mr. Jacov November 23, 2019

sesqui-cousin 

Child of their parent’s half-sibling with the other parent’s full sibling.

My sesqui-cousin is a good person.

sesqui-cousin by Mr. Jacov November 23, 2019

sesqui-first cousin 

Child of their parent’s half-sibling with the other parent’s full sibling.

My sesqui-first cousin is a good person.

sesqui-first cousin by Mr. Jacov November 23, 2019

double-cousin 

Child of a person's maternal aunt (mother’s sister) with that same person's paternal uncle (father’s brother) or child of a person's paternal aunt (father’s sister) with that same person's maternal uncle (mother’s brother).

My double-cousin is a good person.

double-cousin by Mr. Jacov November 23, 2019

double-first cousin 

Child of a person's maternal aunt (mother’s sister) with that same person's paternal uncle (father’s brother) or child of a person's paternal aunt (father’s sister) with that same person's maternal uncle (mother’s brother).

My double-first cousin is a good person.

double-first cousin by Mr. Jacov November 23, 2019