the son of one's son's son; also called [[曾孙|曾孫|zeng1 sun1]] or [[曾孙子|曾孫子|zeng1 sun1 zi5]]

the daughter of one's grandchild

The eldest grandson who, due to the prior death of his father (the eldest son), assumes the role of chief mourner at his grandparents' funerals and inherits the primary responsibility for conducting ancestral sacrifices