Surname
- Adam Petri, Renaissance printer who founded a Basel publishing house
- Carl Adam Petri, who introduced Petri nets
- Egon Petri, Dutch pianist and composer
- Elio Petri, Italian director
- Ellen Petri, Belgian beauty pageant titleholder
- György Petri, Hungarian poet
- Heather Petri, American water polo player
- Heinrich Petri, better known by his Latin name Henricus Petrus
- Julius Richard Petri, German bacteriologist, inventor of the Petri dish
- Laurentius Petri, Swedish clergyman and the first Evangelical Lutheran Archbishop of Sweden
- Luca Petri, Italian professional football player
- Mario Petri, Italian operatic bass
- Michala Petri, Danish recorder player.
- Olaus Petri, Swedish clergyman
- Petrus Petri, Spanish medieval architect
- Tom Petri, U.S. Representative for Wisconsin's 6th congressional district
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