Sontar (The Infinity Doctors)

General Sontar was the ruler of the Sontarans. He was said to look older than other Sonatarans and was important enough to share the name of his people's home planet Sontar. (PDA: The Infinity Doctors)

Behind the Scenes
The suggestion that the Sontarans derive their name from a single person originated from FASA Doctor Who Role Playing Game which claims that they named their planet after him.