[1] The earliest mention of him is found in a work of Patriarch Sisinnius II of Constantinople (c. 996–999).
In contemporary sources, Jeremiah was described as Bogomil's “son and disciple”, the former in the figurative sense.
[3] Indeed, Croatian Slavist Vatroslav Jagić identifies Jeremiah with Bogomil himself, a hypothesis that has been accepted by some scholars and rejected by others.
[4] Jeremiah was the author of a number of apocryphal texts, most notably Tale of the Cross Tree, and several fables.
Due to their heretical nature, his works were included in medieval indices of forbidden books.