Pantaleo / Pantaleon / Panteleimon

The name Pantaleo derives from the Greek name Pantaleon (Πανταλέων), meaning 'all-lion' or 'all-merciful'. It is composed of the elements 'pan' (πᾶν), meaning 'all', and 'leon' (λέων), meaning 'lion'. The name gained significant prominence through Saint Pantaleon, a revered martyr of the early Christian Church. He was one of the Fourteen Holy Helpers, venerated in both Eastern and Western Christianity.

Saint Pantaleon was a physician martyred during the Diocletianic Persecution in the early 4th century. His cult became very popular, particularly in the Byzantine Empire, and spread to Western Europe, especially Italy. The name has been used consistently in Orthodox Christian countries and in regions with strong Italian influence, maintaining its traditional form and meaning over centuries.