Paparazzi is from the character of Paparazzo in Federico Fellini's La Dolce Vita, who by his behaviour gave birth to the term paparazzi (which you spelled correctly in the edit but not in the main message).

However, paparazzo is not an Italian word for mosquito. I looked the term up in wikipedia to be sure, and came upon this information:

In his book Word and Phrase Origins, Robert Hendrickson writes that Fellini took the name from an Italian dialect that describes a particularly annoying noise, that of a buzzing mosquito. In his school days, Fellini remembered a boy who was nicknamed "Paparazzo" (Mosquito), because of his fast talking and consonant blurs (unknown), a name Fellini later applied to the fictional character in La Dolce Vita. This version of the word's origin has been strongly contested.

The word, if it does exist, would be the description of the noise made by a mosquito in an Italian dialect. However, Fellini's screenwriter said the name came from a 1901 book (which does indeed have a Signor Paparazzo, and Paparazzo is an actual last name). Given Fellini's personality, I would be inclined to believe the screenwriter.