History of the star: A yellow binary star situated in the head of the Dragon, Draco, and anciently called; "The Nebulous Star in the Dragon's Eye". Rastaban or Alwaid is from Ra's ath-Thu'ban (1), "Head of the snake". Raso tabbani was a variation. [Hebrew name Rastaban, means the Head of the Subtle (serpent). 

Others think this Arabic title Alwaid, might come from Al 'Awwad, "the Lute-player". It was one of Al'Awa'id, "the Mother Camels" which was known as the Quinque Dromedarii. In the Arabic theme for this constellation the star beta (this star Alwaid), gamma (Etamin), nu (Kuma) and xi (Grumium) in the head of the Dragon represent four mother camels protecting a baby camel from the attack of two hyenas (eta and zeta (Nodus 1). The nomads camp was located nearby  which were the three unnamed stars in the neck of the Dragon: upsilon, tau, and sigma.

It formed part of Al Salib al Waki', "the Falling Cross", beta and xi forming the perpendicular, gamma, mu, and nu the transverse; and thus designated as if slanting away from the observer to account for the paucity of stars in the upright.

Asuia, current in the Middle Ages and since, was from Al Shuja', and often has been written Asvia, the letter u being mistakenly considered the early v.

Still other Desert titles were Al Rakis, "the Dancer", or "Trotting Camel", now given to mu (Arrakas).

Its earlier figuring has been known as the Dragon's Eyes, incorrect now, although Proctor thought them so located in the original figuring of a front view of Draco. Modern drawings place them on the top of the head.

Among Arabian astronomers Al Tinnin and Al Thu'ban, on the Borgian globe, inscribed over beta and gamma, are the words Alghavil Altannin in Assemani's transcription, the "Poisonous Dragon" in his translation, assumed by him as referring to the whole constellation. That there was some foundation for this may be inferred from the traditional belief of early astrologers that when a comet was here poison was scattered over the world.

[Star Names, Their Lore and Meaning, Richard Hinchley Allen, 1889]. 

In the Arabic it is still called Al Waid, which means, "who is to be destroyed" [Bullinger Witness of the Stars].

The general astrological influences of the star: It gives loss of property, violence, criminal inclinations and accidents. (Robson*).

With Moon: Blindness, wounds, quarrels, bruises, stabs, blows (operations can be substituted nowadays) and kicks from horses. (Robson*).

References

*(Fixed Stars and Constellations in Astrology , Vivian E. Robson, 1923)