Fernando de Mompox y Zayas (fl. 1730–1731) (alternatively spelled "de Mómpo y Zayas", without an x) was a leader in the Revolt of the Comuneros of Paraguay. His presence in Paraguay in 1730–1731 was short but influential; despite being an outsider, he quickly became the most influential man in the region in only 6 months. He was a fiery orator who provided an ideological backing for the actions of the rebel comuneros that took over the province from 1731 to 1735.