An Indo-Aryan word of Sanskrit origin meaning Immortal, Eternal, Forever-lasting. Is commonly used for males of Hindu background. 'Amar' is also more likely to be popular as a first name.
Alternatively, is also used (but not as common) amongst Semitic and Latin people (spelt and pronounced differently though). In Arabic: from 'Qamar' meaning of the moon, and from the Spanish 'Amor' meaning to love.
Maharaja Amar I ruled a vast Hindu empire from the tip of Southern India to the mountainous regions of Afghanistan.