Yannis Markopoulos (Greek: Γιάννης Μαρκόπουλος; born 18 March 1939) is a Greek composer.

Giannis Stoforidis (Greek: Γιάννης Στοφοριδης; born 8 May 1989) is a Greek kickboxer fighting in the SUPERKOMBAT Fighting Championship.

Giannis Skondras (Greek: Γιάννης Σκόνδρας; born 21 February 1990) is a Greek professional footballer who plays as a right back for Lamia.

Giannis Stathis (Greek: Γιάννης Στάθης; born 20 May 1987) is a Greek professional footballer.

Giannis Chloros (Greek: Γιάννης Χλωρός; born 30 October 1978) is a Greek footballer who plays for A.O. Nea Ionia F.C. in the Gamma Ethniki.

Ioannis Sfairopoulos (alternate spellings: Giannis, Yiannis, Yannis, Sferopoulos) (Greek: Γιάννης Σφαιρόπουλος; born March 21, 1967) is a Greek professional basketball coach, who is currently the head coach of Maccabi Tel Aviv of the Israeli Premier League and the EuroLeague.

Ioannis Kastritis (alternate spelling: Giannis) (Greek: Ιωάννης Καστρίτης; born April 4, 1982) is a Greek former basketball player and professional basketball coach, who is currently working as the head coach of Iraklis Thessaloniki.

Giannis Gitsioudis (Greek: Γιάννης Γκιτσιούδης; born 17 March 1962) is a former Greek footballer who played as a goalkeeper.

Giannis Agtzidis (Greek: Γιάννης Αγτζίδης born 14 October 1992), is a Greek footballer. He currently plays as a full-back.