Blasco I Alagona or d'Alagona (died 1301), called the Elder, was an Aragonese nobleman and soldier in the service of the Kingdom of Sicily after 1285.
[1] In 1296, Frederick III, who had been proclaimed king by the Sicilians in opposition to the Treaty of Anagni, appointed Blasco a captain in the army.
The Neapolitan admiral Roger of Lauria having occupied Catanzaro in the meantime, Blasco led a small force against the city in the latter half of September and, although outnumbered, won a major victory.
In January 1299, Frederick rewarded Blasco for his service with the castle and lands of Naso, confiscated from the traitors Giovanni and Matteo Barresi.
[1] At the Battle of Capo d'Orlando (4 July 1299), in which Frederick's navy defeated a combined Neapolitan–Aragonese fleet trying to enforce the Treaty of Anagni, Blasco's actions were credited with saving the king's flagship.