Half-3C:
1- Parent's half-second-cousin's child.
2- Grandparent's half-first-cousin's grandchild.
3- Great-grandparent's half-sibling's great-grandchild.
4- Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common.
My half-third-cousin is a good person.
1- Half-great-grandpibling's great-grandchild.
2- Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common.
1- Half-great-grandpibling's great-grandchild.
2- Living being that has zero parents, zero grandparents, zero great-grandparents and one great-great-grandparent in common with other living beings.