double-1C2R

Double-first-cousin-twice-removed: child of their great-grandparent’s full sibling with the other great-grandparent’s full sibling or grandchild of their maternal first cousin with the paternal first cousin or double-first cousin’s grandchild or child of their parent's grandparent's full sibling with the other parent’s full sibling's grandchild or child of their parent's parent's sibling's child with the other parent’s sibling's child's child.