zanzibar: Probably <Dimitrios Agnos> is wrong.
Curious case, and yes, I think <takchess> is correct - this is <Anagnostopoulos, Dimitri>, FIDE id = 4204077 (dob 1970).
<OlimpBase> also has this player indexed as <Agnos, Demetrios>.
but the content, and FIDE link, are for <Anagnostopoulos, Dimitri>. Actually, the correction was applied between Jan -> Jul 1996.
A bit confusing.
And to add to the confusion - FIDE has a card for an unrated <Anagnostopoulos, Dimitrios> id=4273036 dob 1999.
(And 365chess has 8 games for Demetrios Agnos - fwiw)