Demesne :: Demesne (n.) A lord's chief manor place, with that part of the lands belonging thereto which has not been granted out in tenancy; a house, and the land adjoining, kept for the proprietor's own use..
Esnecy :: Esnecy (n.) A prerogative given to the eldest coparcener to choose first after an inheritance is divided.
Mesne :: Mesne (a.) Middle; intervening; as, a mesne lord, that is, a lord who holds land of a superior, but grants a part of it to another person, in which case he is a tenant to the superior, but lord or superior to the second grantee, and hence is called the mesne lord..