John of Genoa or Johannes Balbus[1] (died c. 1298) was an Italian grammarian and Dominican priest.
At an advanced age, John gave away his wealth to the poor of Genoa and entered the Order of St Dominic.
Peter Schöffer and Johann Fust published the Catholicon in 1450, and it was several times republished.
A Postilla super Joannem and a Tractatus de Omnipotentia Dei have also been attributed to him.
This article incorporates public domain material from McClintock, John; Strong, James (1867–1887).