Alpha Centauran

The Alpha Centaurans, also known simply as Centaurans or Centaurians, were the native humanoid species of the planet Alpha Centauri VII, or as they called it Al Rijil. (ST reference: The Worlds of the Federation, et al.)

Centaurians appeared identical to Humans, bearing a specific resemblance to those native to Greece or Italy. Federation scientists found evidence this was because the population was descended from a group of Terran Greeks which had been transplanted from Earth in the 3rd century BC. (DS9 novel: Devil in the Sky; ST reference: The Worlds of the Federation)