House of Moray

The so-called House of Moray (also the House of MacRory) is a historiographical and genealogical construct to illustrate the succession of rulers whose base was at the region of Moray and who ruled sometimes a larger kingdom. It is much the same as Cenél Loairn (although not necessarily exactly), an originally Celtic concept to express one of the two rivalling leader clans of early medieval Scotland.

The so-called house of Loairn or of Moray was distantly related to the Scottish House of Alpin, its rival, and claiming descent from the eponymous founder Loarn mac Eirc. Some of its members became the last kings of the Picts while three centuries later, two members succeeded to the Scottish throne ruling Scotland from 1040 until 1058.

At the times when the rival held the throne, the Loairn leaders however usually had their effectively independent state of Moray, where a succession of kings (kinglets) or mormaers ruled.

The Loairn succession followed quite loyally the rules of tanistry, resulting in practice to outcomes where branches of the leaders' extended family rotated on the rulership, possibly keeping a balance between important branches (this is quite typical for tribal societies, where primogeniture is much less usual than agnatic seniority or turns on the throne). For example, MacBeth descended from one branch and his stepson Lulach from another.

Not much nor convincing evidence survives that the House of Loairn followed in any way the postulated Pictish tradition of matrilineal succession. Rather, their succession seems to follow quite fully the Irish-Celtic tradition of agnatic clan.