Sabatino Enrico 'Nello' Rosselli (Rome, 29 November 1900 – Bagnoles-de-l'Orne, 9 June 1937) was an Italian Socialist leader and historian.

His parents were Giuseppe Emanuele "Joe" Rosselli (1867 - 1911) and Amelia Pincherle (1870 - 1954), who was the paternal aunt to writer Alberto Moravia.

[1] Nello was a member of the reformist Unitary Socialist Party of Filippo Turati, Giacomo Matteotti and Claudio Treves, which had split from the PSI.

After the rise of Fascism, he fled to France with his brother, and became active there in anti-Fascist and socialist politics, helping to found the group Giustizia e Libertà and aiding the Republicans in the Spanish Civil War, as well as carrying out propaganda missions within Italy.

[3] His wife Maria Todesco, their four children Silvia, Paola, Aldo and Alberto, and his mother Amelia Pincherle Rosselli survived him.