Jean Baptiste Abbeloos (15 January 1836 – 25 February 1906) was a Belgian orientalist and Rector of the University of Leuven.

After his ordination to the priesthood on 22 September 1860, he studied at Leuven and Rome, devoting himself especially to Syriac language and literature.

He received the degree of Doctor of Theology from the University of Leuven on 15 July 1867 and spent the following winter in London.

On his return to Belgium, he was appointed Professor of Holy Scripture in the seminary of Mechelen.

Failing health obliged him to abandon the work of teaching, and he became, in 1876, pastor at Duffel.