What does Najm mean?
The masculine Arabic name from 'najm' ('star'), counterpart to Najma. It also appears in compound names such as Najm al-Din ('star of the faith').
What does Rigel mean?
The proper name of the bright blue star marking the foot of Orion, from Arabic 'rijl' ('foot', from 'Rijl Jauzah al-Yusra', 'the left foot of the giant'). The literal meaning is 'foot'; it is included as the proper name of a specific star.