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					Originally Posted by  HQWest
					 
				 
				
			
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 I'm not sure what you're saying or asking, but:
singular male:  alumnus
singular female:  alumna
plural male or mixed group (male and female, even if only one male): alumni
plural female:  alumnae
These words are Latin, not Greek.  But no, plurals in Greek (and in Latin) are not formed by adding 
s.
ETA:  Cross-posted with DeltaBetaBaby and ladybug12.