Sources and the Vita of Hildegard
Disibod is among the early medieval figures whose memory is preserved almost entirely through later hagiography rather than contemporary documents. His name first appears in the martyrology compiled by Hrabanus Maurus in the ninth century. The principal narrative source is the Vita sancti Disibodi written by Hildegard of Bingen around 1170, when Hildegard was associated with the monastery built on the site of his foundation. Because this account was composed centuries after the events it relates, modern accounts transmit its details as tradition rather than as firmly fixed history, and Hildegard herself supplied no precise dates.
The variation in the dates assigned to Disibod reflects this distance between the saint and his recorded life. He is commonly placed in the seventh century, with spans such as 619 to roughly 674 or 700 appearing in different accounts. His own database entry lists him as belonging to the eighth century, while the broader tradition more often situates his career in the seventh.