x_{1} is a sibling of x_{2} by bond/tie/standard/parent(s) x_{3}.

- bruna
- x
_{1}is brother of/fraternal to x_{2}by bond/tie/standard/parent(s) x_{3}; [not necess. biological]. - mensi
- x
_{1}is a sister of/sororal to x_{2}by bond/tie/standard/parent(s) x_{3}; [not necessarily biological]. - tamne
- x
_{1}is cousin to x_{2}by bond/tie x_{3}; [non-immediate family member, default same generation]. - selfamti
- x
_{1}is an niece/nephew of x_{2}by bond/tie x_{3}. - paznu
- x
_{1}is a non-binary offspring/child of parent(s) x_{2}[not necessarily biological]; x_{1}is filial (but not a son or daughter). - pentu
- x
_{1}is a non-binary sibling of/to x_{2}by bond/tie/standard/parent(s) x_{3}; [not necessarily biological]. - tcuti
- x
_{1}is a sibling of a direct ancestor/elder of x_{2}by bond/tie/relation/standard x_{3}(not necessarily genetic/biological nor necessarily directly ancestral); x_{1}is an associated member of one of x_{2}'s ancestor's generation; x_{1}is an (great-(great-(...)))uncle/aunt of x_{2}. - dzu'enba
- x
_{1}and x_{2}are mutual sibling nodes in a directed tree graph x_{6}such that their shared parent node(s) x_{5}is/are the most-recent common direct ancestor of x_{3}and x_{4}, such that x_{1}is a direct ancestor of or simply is x_{3}(as the case may be), and such that x_{2}is a direct ancestor of or simply is x_{4}(as the case may be), all according to tree ordering relation x_{7}.