Seneca

1. 1. A Native American people formerly inhabiting western New York from Seneca Lake to Lake Erie, with present-day populations in this same area and in southeast Ontario. The Seneca are the westernmost member of the original Iroquois confederacy.
   2. A member of this people.
2. The Iroquoian language of the Seneca.

[From Dutch Sennecaas, probably of Mahican origin.]

The noun has 3 meanings:

Meaning #1: Roman statesman and philosopher who was an advisor to Nero; his nine extant tragedies are modeled on Greek tragedies (circa 4 BC - 65 AD)
  Synonym: Lucius Annaeus Seneca

Meaning #2: a member of the Iroquoian people formerly living in New York state south of Lake Ontario

Meaning #3: the Iroquoian language spoken by the Seneca people