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.
In 1595 king Philip II of Spain appointed him abbot of the Benedictine monastery of St. Willibrord at Echternach.
In 1581, Bertelius published a catalogue of the abbots of the Altmünster abbey and his Dialogi XXVI in regulam S. Benedicti.
The year 1606 saw the publication of a treatise on the pagan gods worshipped by the ancient Germanic tribes (Deorum sacrifiorumque gentilium descriptio).