Namesakes
Bishops of Rome and the Popes:
1 pope
Agatho (a.k.a. Agathon) 678-681 
Characters in Greek Mythology:
1 character
Agathon (m)
Agathon I 662-680
Olympic Medalists:
1 bronze
(bronze) Aat de Roos 1936 field hockey
Saints:
1 saint
Saint Agatho (a.k.a. Agathon) ?-681