successor

Etymology

From Anglo-Norman successour, from Latin successor.

noun

1. A person or thing that immediately follows another in holding an office or title.
   George W. Bush was successor to Bill Clinton as President of the US.
   As Di Matteo celebrated and captain John Terry raised the trophy for the fourth time, the Italian increased his claims to become the permanent successor to Andre Villas-Boas by landing a trophy. May 5, 2012, Phil McNulty, “Chelsea 2-1 Liverpool”, in BBC Sport
2. The next heir in order or succession.
3. A person who inherits a title or office.
4. (arithmetic, set theory) The integer, ordinal number or cardinal number immediately following another.
   A limit ordinal is not the successor of any ordinal.