Sovereignty goddess is a scholarly term, almost exclusively used in Celtic studies (although parallels for the idea have been claimed in other traditions, usually under the label hieros gamos). The term denotes a goddess who, personifying a territory, confers sovereignty upon a king by marrying or having sex with him. Some narratives of this type correspond to folk-tale motif D732, the Loathly Lady, in Stith Thompson's Motif-Index. This trope has been identified as 'one of the most well-known and often studied thematic elements of Celtic myth'. It has also, however, been criticised in recent research for leading to "an attempt to prove that every strong female character in medieval Welsh and Irish tales is a souvenir of a Celtic sovereignty goddess".