sesqui-great-cousin-aunt

Daughter of their great-grandparent’s half-sibling with the other great-grandparent’s full sibling.

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

double-first great-cousin-aunt

Daughter of their great-grandparent’s full sibling with the other great-grandparent’s full sibling.

My double-first great-cousin-aunt is a good person.

step-cousin-aunt

1. The daughter of one's grandparent's stepsibling.
2. The stepdaughter of one's grandparent's sibling.
3. The daughter of one's stepgrandparent's sibling.

My step-cousin-aunt is a good person.

third great-cousin-aunt

Grandparent's female third cousin.

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

half-cousin-aunt

Parent's female half-first cousin.

My half-cousin-aunt is a good person.