Tresayle
Pronunciation : Tres"ayle` (tr?s"al`)
Part of Speech : n.
Etymology : [F. trisa?eul, from L. tris, tres, three + F. a?eul grandfather. Cf. Besaiel, and see Ayle.]
Definition : Defn: A grandfather's grandfather. [Obs.] Writ of tresayle (O. Eng. Law), a writ which lay for a man claiming as heir to his grandfather's grandfather, to recover lands of which he had been deprived by an abatement happening on the ancestor's death. Mozley & W.
Source : Webster's Unabridged Dictionary, 1913