The grandchild-in-law of one's grandparent-in-law's sibling.
My second co-cousin-in-law is a good person.
Someone who, in relation to others, has zero parents, zero grandparents and five great-grandparents in common.
Irregular-triple-second-cousin.
Living being that has zero parents, zero grandparents and five great-grandparents in common with other living beings.
irregular-triple-second-cousin.
Second cousin's great-grandson.
My second great-great-cousin-nephew is a good person.
Someone who, in relation to others, has zero parents, zero grandparents and eight great-grandparents in common.
Living being that has zero parents, zero grandparents and eight great-grandparents in common with other living beings.
Second-cousin-twice-removed (2C2R).
My second-cousin-2X-removed is a good person.