Pasquale del Pezzo, Duke of Caianello and Marquis of Campodisola (2 May 1859 – 20 June 1936), was an Italian mathematician.
[1] He was born in Berlin (where his father was a representative of the Neapolitan king) on 2 May 1859.
His wife was the Swedish writer Anne Charlotte Leffler, sister of the great mathematician Gösta Mittag-Leffler (1846–1927).
Starting in 1919 he became a Senator of the Kingdom of Italy until his death.
He is remembered particularly for first describing what became known as a del Pezzo surface.