Half-2C:
1- Parent's half-first-cousin's child.
2- Grandparent's half-sibling's grandchild.
3- Person who, in relation to the other person, has zeroparents, zero grandparents and one great-grandparent in common.
1- Half-grandpibling's grandchild.
2- Living being that has zeroparents, zero grandparents and one great-grandparent in common with other living beings.