https://www.catholic.org/encyclopedia/view.php?id=11429
Thegan (Degan) of Treves - Encyclopedia Volume - Catholic Encyclopedia - Catholic Online
Chronicler, d. about 850. Very little is known of his life; all that is certain is that he was assistant Bishop of Trier and was a warm friend of Walafrid...
degan of trevesencyclopedia volumethegancatholiconline