Hildegrim of Châlons was an 8th and 9th-century Benedictine monk who served as both an abbot and a bishop. Born into a Frisian noble family, he received an extensive education in liberal arts, likely studying at Monte Cassino, the Utrecht Cathedral School, and in York. After being ordained a priest, he was appointed Bishop of Châlons around 804. Following the death of his brother, Ludger, he became the second abbot of Werden Abbey in 809, a position he held until his death in 827.