Daniilŭ is the Old Church Slavic form of Daniel. This name represents the earliest Slavic adaptation of the biblical name, which was spread among Orthodox Christian communities through liturgical texts and missionary work by Saints Cyril and Methodius in the 9th century. Etymology The name ultimately derives from the דָּנִיֵּאל (Daniyyel) in Hebrew, meaning "God is my judge", from the roots דִּין (din) meaning "to judge" and אֵל (ʾel) meaning "God". Therefore, like its parent form, Daniilŭ carries the theological meaning "God is my judge". Historical Context Old Church Slavic, the liturgical language of the Slavic Orthodox churches, rendered biblical names systematically. Daniilŭ follows the pattern of converting Hebrew names: the '-el' element becomes '-il', and a final -ŭ (a front jer vowel) is added due to Slavic phonology. This form was later the basis for modern versions such as Daniil in Russian and Danial in Persian. Cultural Significance Throughout history, the name has been borne by numerous Orthodox saints and Christian faithful. It remains a vibrant religious name in Slavic countries, often celebrating the prophetic legacy of the biblical Daniel. Meaning: "God is my judge" Origin: Hebrew, via Old Church Slavic Type: Religious name Usage regions: Slavic-speaking Orthodox Christian nations