Vars. of Odal, etc.; property held by udal, or allodial, right -- Obs. exc. in Shetland and the Orkney Islands, where udal designates a freehold, land held in fee simple without any charter and free of any feudal character.  [Webster 1913 Suppl.]

 In the Shetland and Orkney Islands, one who holds property by udal, or allodial, right.  Sir W. Scott.  [1913 Webster]