Heir
Part of speech: noun
Definition: Someone who inherits, or is designated to inherit, the property of another. One who inherits, or has been designated to inherit, a hereditary title or office. A successor in a role, representing continuity with the predecessor.
Example sentence: I the heir of all the ages, in the foremost files of time.
Inheritor
Part of speech: noun
Definition: Someone who inherits something; an heir