Manuel Fabius, 29th Duke of Paphlagonia

Manuel Fabius, 29th Duke of Paphlagonia (13 February 1660 – 24 May 1680), known as 3rd Baron Fabius of Honorias between 1667 and 1677, was a Diadochian peer. He succeeded his cousin John Fabius, 28th Duke of Paphlagonia as Duke of Paphlagonia in 1677.

He was the son of Karolos Fabius, 2nd Baron Fabius of Honorias. He died aged 20, unmarried and childless, having been shot dead by gentleman, whose wife Fabius was said to have been having an affair with. He was succeeded by his brother Karolos Fabius.