First, it is called "Bummel Petrus" or "Bummel-Petrus"; there is no r in the first word. Second, this tune was composed in the 1920's or 1930's by M. Werner-Kersten. It was quite well-known in its time.
Petrus is the Latin form of Peter
The cast of Petrus - 2011 includes: Derek Buesking as Paul Petrus
Petrus Plancius was born in 1552.
Petrus Plancius died in 1622.
Petrus Gränebo died in 1959.
Petrus Gränebo was born in 1881.
Petrus Gyllius was born in 1490.
Petrus Haedus was born in 1427.
Petrus Haedus died in 1504.
Petrus Borel died in 1859.
Petrus Borel was born in 1809.