Rucbah

The traditional star name Rucbah (from the Arabic word ركبة rukbah meaning "knee") has been applied to three different stars:
 * Alpha Aquarii in the constellation Aquarius (this star is now called Sadalmelik by the IAU)
 * Delta Cassiopeiae in the constellation Cassiopeia (this star is now called Ruchbah by the IAU)
 * Alpha Sagittarii in the constellation Sagittarius (this star is now called Rukbat by the IAU, but was sometimes known as Al Rami)