The Graeae ("old women" or "gray ones"), were 
Greek mythological sisters, the daughters of 
Phorcys and 
Ceto and thus members of the 
Phorcydes.  They took the form of grey-haired old women from the moment of their births.  Their names were 
Deino, 
Enyo and 
Pemphredo.  They were also unusual in only having one eye and one tooth between them and being born with gray hair.  These were shared and the sisters took turns in using them.  
Perseus forced them to tell the whereabouts of their sisters, the 
Gorgons, by stealing their eye while they were passing it between them and ransoming it for the information.
Alternatives: Graii, Graiae
Graeae is also the name of an influential British theatre company run by disabled actors.
 
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