Adailton Pereira dos Santos (born 18 April 1973), better known as Ady, is a retired footballer who last played for MyPa in Finnish Veikkausliiga.
Born in Caatiba, Bahia, Brazil, Ady represented the Tunisia national team.
As a teenager, he started to be noted as a good soccer player in a local championship called Liga Desportiva Caatibense, and later, he moved with his agent's help to Itambé, when he played for Itambé's soccer team.
After a good performance in this championship, he signed a contract with Esporte Clube Bahia and then his career reached the national scope.
After leaving Espérance, Ady played, from 2003 to 2005, for Al Ahly Tripoli in Libya.