Tanist n. : In Ireland, a lord or proprietor of a tract of land or of a castle, elected by a family, under the system of tanistry.

Example:


Taxonomy
tanistry, succession, Tanist, branch, dynasty, king, Pictish, Scotland, candidate, principles, heir, royal dynasty, free encyclopedia, office, Blood, the clan, the Irish, chief.

Defination from the web:
tanist or substitute for the sacred king was incorporated as a central element in Sir James Frazer's study of European mythologies, The Golden Bough. ... The tanist influenced Robert Graves' interpretation of The Greek Myths (1955) and The White Goddess. ...