That's from The Penguin Book of Hindu Names by Maneka Gandhi. She claims that the "exact or literal meaning" of Âtreya is "receptacle of glory; crosses the three worlds." She gives the "exact or literal meaning" of the female name Âtreyî as "receptacle of glory; crosses the three worlds; belonging to Atri." She gives the "exact or literal meaning" of Atri as "who devours; overcomes; progresses; prosperous and glorified."
If scholars of Sanskrit in India don't think Maneka Gandhi's work is very good, please tell me. In the preface to the book she claims to have consulted many "pandits and Sanskrit teachers who corrected my mistakes", but perhaps she didn't consult the right ones. :) As an American I have no way of knowing how her work is received in India and am just assuming that a book published in New Delhi with a list of over 140 ancient Sanskrit sources in the back would be more likely to have accurate derivations of Indian names than a book published in the USA. But I certainly could be wrong there.