Efthimios is an alternate transcription of the Greek name Ευθύμιος (Efthymios), which itself derives from the Ancient Greek Εὐθύμιος (Euthymios), meaning "in good spirits, generous." The name is a modern Greek form, common in Greece and among the Greek diaspora. It ultimately originates from the elements eu (good) and thymos (soul, spirit), reflecting a positive character. Etymology and Historical Background The root name Euthymius was Latinized from the Greek Euthymios, worn by several early Christian saints. The most notable is Saint Euthymius the Great (377–473 AD), a founder of monasticism in Palestine whose feast day is celebrated on January 20. The name gained popularity in the Eastern Orthodox world, including Greece, Russia (as Yefim), and other Slavic countries. Cultural and Linguistic Variations In modern Greek, the name appears as both Efthymios and the shorter Efthimis, with the feminine forms Efthimia and Efthymia. The sound change from Euth- to Efth- reflects the historical velar fricative shift in Greek pronunciation. Related foreign equivalents include Spanish Eutimio, Portuguese Eutímio, and Russian Yefim or the diminutive Fima. Notable Bearers Historical figures with the name include Efthimios of Sardis (8th–9th century), a saint and bishop, and Efthimios (Patriarch of Jerusalem) in the 11th century. Contemporary notables may include actors, athletes, or politicians in Greece, though the name remains relatively rare outside Greek communities. Meaning: In good spirits, generous Origin: Greek, from euthymos Type: Given name|primary Usage: Greek