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Aldebaron III was the inhabited third planet of the Aldebaron system. This was the location of a Federation colony. (TOS: "Where No Man Has Gone Before")

In 2371, the Ferengi Belongo, nephew of Grand Nagus Zek, was detained on Aldebaron III by the local Starfleet authorities. (DS9: "Past Tense, Part I")

The Aldebaron colony, mentioned in a display graphic in "Where No Man Has Gone Before", was the former posting of Elizabeth Dehner.

According to Startrek.com, this planet was the same as Aldebaran III. [1]

The pronunciation for Aldebaron was, "al-DEB-uh-ron". [2]