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.
Child of their parent’s half-sibling with the other parent’s full sibling.
My sesqui-cousin is a good person.
Sesqui-first cousin’s daughter.
My sesqui-cousin-niece is a good person.
Sesqui-first cousin’s granddaughter.
My sesqui-great-cousin-niece is a good person.