Cassian Haid, born Josef, was the 75th General Abbot of the Common observance between 1920–1927.
He entered the Abbey of Mehrerau of the Common Observance in 1897 .
After his resignation, he was succeeded by dom Franciscus Janssens.
He died as abbot in his abbey in 1949 and was succeeded by Heinrich Suso Groner.
This article about a Catholic clergyman is a stub.