It has the traditional name Markab (or Marchab), which comes from an Arabic word مركب markab, "the saddle of the horse", or is mistranscription of Mankib comes from an Arabic phrase منكب الفرس Mankib al-Faras, "(the Star of) the Shoulder (of the Constellation) of the Horse" for β Pegasi.
An alien race, the Markab exists in the fictional Babylon 5 universe, but although the name is based on the same star name (Markab), the creator of Babylon 5 has explicitly denied any Scientology connection (but the government of that species is the Markab Confederacy).