Johannes Bertelius [also Jean Bertels] (1544 – June 19, 1607), abbot of Echternach and writer of a history of Luxembourg, was born in Leuven. After obtaining a degree in philosophy at the Pedagogy of the Lily in Leuven University, Bertelius was elected abbot of Altmünster Abbey, Luxembourg, in 1573 and was consecrated in 1576. On his orders the relics of John the Blind, Duke of Luxembourg and King of Bohemia, were buried there. In 1595 king Philip II of Spain appointed him abbot of the Benedictine monastery of St. Willibrord at Echternach.