Saint Maroun was a 5th century Syriac Christian

Syriac Christianity

Syriac or Syrian Christianity , the Syriac-speaking Christians of Mesopotamia, comprises multiple Christian traditions of Eastern Christianity. With a history going back to the 1st Century AD, in modern times it is represented by denominations primarily in the Middle East and in Kerala, India....

 monk

Monk

A monk is a person who practices religious asceticism, living either alone or with any number of monks, while always maintaining some degree of physical separation from those not sharing the same purpose...

 who after his death was followed by a religious movement that became known as the Maronites. The Church that grew from this movement is the Maronite Church

Maronite Church

The Syriac Maronite Church of Antioch is an Eastern Catholic Church in full communion with the Holy See of Rome . It traces its heritage back to the community founded by Maron, a 4th-century Syriac monk venerated as a saint. The first Maronite Patriarch, John Maron, was elected in the late 7th...

. St. Maroun was known for his missionary work, healing and miracles, and teachings of a monastic devotion to God. He was a priest that later became a hermit. His holiness and miracles attracted many followers and drew attention throughout the empire.
Maroun is considered the Father of the spiritual and monastic movement now called the Maronite Catholic Church.