phratry

fratria puhekieltä A clan or kinship group consisting of a number of families claiming descent from a common ancestor and having certain collective functions and responsibilities. (defdate)
*2016, Keith Cohen, translating Maurice Sartre, in Corbin, Courtine & Vigarello (Eds.), A History of Virility, Columbia University Press 2016, p. 40:

To be sure, he plays a decisive role at the time of the birth, since he confers on the child legitimacy, at least on the son, by taking him in his arms, walking him around the house and declaring him his son in front of the members of his phratry: in Athens, no one may obtain citizenship without these familial rites.