Aias or Ajax ? (1)

Another question I have been worried for a long time is the name of 
Greek hero, Aias . Why do you call him "Ajax" [eidzaeks] ?
 
I and my friends once discussed it , and realized the reason of sound 
"eidz". But the problem remained was the transformation of "-as"
into "aeks", not only in the sounds but also in its form . 

Regards,   90deg.F and very damp here , huu .
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## TOSHIYUKI SAITO
##saitone@onyx.dti.ne.jp
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