His father, a German, was chaplain to King Leopold I of Belgium, and Jean Scheler, after studying at Bonn and Munich, became King's librarian, and professor at the Universite Libre de Bruxelles.
His investigations in Romance philology earned him a wide reputation.
[2] The most important of his numerous philological works are: He also edited the fourth edition of Diez's Etymologisches Wörterbuch der romanischen Sprachen (Bonn, 1878), and completed Grandgagnage's Dictionnaire étymologique de la langue wallonne (Louvain, 1880).
He also published several critical editions of Middle Ages texts, including one of Les Poésies de Froissart (Brussels, 1870–1872), and a monograph Sur le séjour de l'apôtre saint Pierre a Rome (Brussels, 1845), which was translated into German and English.
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