Ivan Tomko Mrnavić

Ivan Tomko Mrnavić
Cover of the 1631 book Osmanchica authored by Mrnavić
Born	1579 Sebenico (Šibenik), Republic of Venice
Died	1637 Republic of Venice
Nationality	Venetian
Other names	Ioannes Tomcvs Marnauitius
Occupation	Catholic bishop and author of historical works

Ivan Tomko Mrnavić (Latin: Ioannes Tomcvs Marnauitius) (1579–1637) was a Venetian Catholic bishop and author of historical works. He was the author of several forgeries, with the most famous being that of the "Life of Justinian".

Mrnavić believed that the Illyrians were Slavs. He claimed that Skanderbeg, the national hero of Albania, was of Slav origin, which prompted Frang Bardhi to write a biography on Skanderbeg published in Venice in 1636 as a polemic against him, defending an Albanian identity of Skanderbeg.

His works written in Latin include:

His works written in "Illyrian" language include: