Odilo is a masculine given name of Germanic origin, derived from a short form of names beginning with the Old German element uodil meaning "heritage" or ot meaning "wealth, fortune". It is closely related to the feminine name Odilia, and cognates include Odo, Otto, and the French form Odilon. Etymology and History The name Odilo belongs to a widespread family of Germanic names derived from the element *audaz ("wealth, prosperity"), which evolved into Old High German ot and uodil. This root also appears in names like Otto and Oda. The suffix -ilo or -ilo is a diminutive, giving Odilo the sense of "little wealth" or "little heritage". Notable Bearer: Saint Odilo The most prominent bearer is Saint Odilo (c. 962–1049), the fifth abbot of the Benedictine monastery of Cluny in France. He served from 994 until his death and was a key figure in the Cluniac reform, which sought to restore monastic discipline and independence from secular control. Under his leadership, Cluny expanded its influence across Europe. Odilo is also credited with instituting the feast of All Souls' Day (November 2) in Cluniac monasteries, a practice that later spread to the entire Western Church. His feast day is celebrated on January 1 or January 18 in some traditions. Related Forms and Variants The name Odilo has a number of variants across different languages: Audo, Odo, Otto (Germanic), Odilon (French), Udo (German), Oto (Slovak), and Ott (Estonian). Feminine forms include Oda, Odila, and Odilia. These names share the same Germanic root and often occur in medieval records.