Petrus Abailardus, Latin name for Abelard;

Petrus may refer to Saint Peter, the first pope;

Petrus Peregrinus, 14th century French scientist;

Petrus Ramus

Petrus Aureolus

Petrus Canisius, 16th century German Catholic theologian and polemicist;

Pietro d'Abano or Petrus de Abano, (1257 – 1315) Italian philosopher and doctor;

Petrus Christus, painter

Petrus Alfonsus, Spanish Jewish writer

Petrus Jacobus Joubert

Petrus Baldus de Ubaldis

Petrus Trothun Aurelianis, 13th century singer of the Notre Dame School, mentioned in the writings of Anonymous IV.

Petrus Bernardinus, Florentine sectarian

Petrus Diaconus, several people

Petrus de Natalibus, Venetian hagiographer

Peter of Capua, an Italian scholastic

Priest Petrus, 5th century Illyrian priest;

Petrus comes from the Greek meaning "rock", and is the common English prefix "petro-" used to describe rock-based substances, like petros-oleum or "rock oil." Petrus (Peter) is a common name for people from antiquity through the medieval era, and may refer to one of the following:

Petrus de Cruce, late 13th century composer and author, one of the most significant and influential composers of the late ars antiqua;

Château Pétrus, one of the great wine producers of Pomerol, Bordeaux.