Namesakes
Eurovision Song Contest Winners:
1 winner
Tomi "Mr Lordi" Putaansuu (a.k.a. Petteri) 2006 Finland 
Finnish Presidents and Prime Ministers:
1 prime minister
(prime minister) Petteri Orpo 2023-
Notable Athletes:
1 ice hockey
(ice hockey) Iiro Järvi (a.k.a. Petteri) 1965-
Notable Musicians:
1 musician
Tomi "Mr Lordi" Putaansuu (a.k.a. Petteri) 1974-
Olympic Medalists:
1 bronze, 1 bronze/silver, 1 silver, 1 silver/bronze
(bronze) Juha Ylönen (a.k.a. Petteri) 1998 ice hockey
(silver) Jukka Hentunen (a.k.a. Petteri) 2006 ice hockey
(bronze/silver) Aki Berg (a.k.a. Petteri) 1998; 2006 ice hockey
(silver/bronze) Jussi Jokinen (a.k.a. Petteri) 2006; 2014 ice hockey