The Collaborative International Dictionary of English v.0.48:
Inheritor \In*her"it*or\, n. One who inherits; an heir. [1913 Webster] Born inheritors of the dignity. --Milton. [1913 Webster]WordNet (r) 3.0 (2006):
inheritor n 1: a person who is entitled by law or by the terms of a will to inherit the estate of another [syn: heir, inheritor, heritor]