Andreus is a masculine appellation of Hellenic origin, deriving from the Ancient Greek Andreas—itself rooted in aner, “man”—and thus etymologically connoting qualities of courage and masculine vigor. Historically propagated through ecclesiastical channels by the veneration of Saint Andrew the Apostle, the name has yielded variants across Latin and vernacular traditions yet has remained comparatively rare in Anglo-American usage, with annual United States registrations typically numbering in the low double digits and placing it beyond the 900th rank among male names. Pronounced AN-dree-əs (/ˈæn.dri.əs/) in contemporary English, Andreus occupies a sphere of classical resonance and distinctive presence, offering a scholarly alternative to its more ubiquitous counterpart while preserving its venerable heritage.