Alpha Herculis (α Her, α Herculis) is a multiple star system in the constellation Hercules. It has the traditional name Rasalgethi or Ras Algethi (Arabic: رأس الجاثي ra's al-jaθiyy Head of the Kneeler), and the Flamsteed designation 64 Herculis.[6] The traditional name "Head" comes from the fact that in antiquity Hercules was depicted upside down on the constellation maps.
The term ra's al-jaθiyy or Ras al Djathi was appeared in the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, which was translated into Latin as Caput Ingeniculi.[7]
In Chinese astronomy, Rasalgethi is called 帝座, Pinyin: Dìzuò, meaning Emperor's Seat, because this star is marking itself and stand alone in Emperor's Seat asterism, Heavenly Market enclosure (see : Chinese constellation).[8] 帝座 (Dìzuò) was westernized into Ti Tso by R.H. Allen, with the same meaning [9]
Excerpt from Wikipedia.