phratric
/ˈfreɪtrɪk/adjective
Of or relating to a phratry or kinship group; consisting of phratries.
Origin
Mid 19th century; earliest use found in George Grote (1794–1871), historian and politician. From ancient Greek ϕρατρικός of or relating to a phratry or kinship group from ϕρατρία + -ικός.