Namesakes for Petrus
Peter (a.k.a. Petrus)
?-67
(chemistry) Peter Debye (a.k.a. Petrus)
1936
(cricket) Nicolaas Scholtz (a.k.a. Petrus)
1986-
Marianne Thyssen (a.k.a. Petrus)
1956-
(gold) Piet de Brouwer (a.k.a. Petrus)
1920 archery - moving target 28 m, team
Saint Peter (a.k.a. Petrus)
?-67 
Saint Petrus van Assche
?-1572