Aldebaran is routinely called one of the four Royal Stars of Persia, the Watcher of the East, with an archangel attached. This scheme deserves more scepticism than it usually receives.
The four are given as Aldebaran, Regulus, Antares and Fomalhaut, and the appeal is obvious: they are bright, widely spaced, and were once near the four cardinal points of the year. The usual claim is that they marked the solstices and equinoxes for the Persians around 3000 BC, which is arithmetically in the right area, precession would have placed them near those points at some period, and this is the strongest part of the case.
The weak parts are numerous. There is no securely identified Persian text setting out four royal stars in this form. The four stars are not equally spaced; Aldebaran and Antares are close to opposite, and Regulus and Fomalhaut are not well placed against them. The set does not correspond to the Babylonian material, which is far better documented and organised quite differently, as Rochberg and others have set out. And the assignment of the archangels Michael, Raphael, Uriel and Gabriel to the four is not ancient Persian at all, it is a Western esoteric elaboration, and the pairing varies between sources, which is what one expects of a modern invention rather than a transmitted tradition.
The scheme is also inconsistent with the better-attested one. Agrippa's Behenian fifteen include Aldebaran, Regulus and Antares but not Fomalhaut, which is difficult to explain if a four-star royal set were a live tradition in the Renaissance.
The honest description is that the Royal Stars are a real and old-feeling idea with a genuine astronomical basis and no identified ancient source, considerably less well founded than Ptolemy's attributions and presented with far more confidence.