Johannes Symonis Hasprois

In 1384 he was the petit vicaire (lesser vicar) of Cambrai Cathedral, and in the same diocese he obtained the rectorate of the parish church of Liessies, probably in 1388.

He left his parish between August 1390 and 1393 and went to serve as a private chaplain to Pope Clement VII at the Papal chapel at Avignon.

[2] Hasprois's early two-voice ballade "Puisque je sui fumeux" is "a prime example of the exceedingly complex style of the ars subtilior.

There is also an incomplete rondeau refrain, "Jone, gente, joyeuse", with a tenor part lacking a text, ascribed to Hasprois in one manuscript.

Modern scholars have suggested several anonymous compositions as having possibly been composed by Hasprois: three from the manuscript GB-Ob 213, based on style, and two songs from the so-called "Leiden fragments", because his name appears in their texts.

The church of Saint Hiltrude at Liessies was Hasprois's parish church from 1388 until 1390.