Alfonso IV, 1299–1336, king of Aragón and count of Barcelona (1327–36), son and successor of James II. Before his accession he conquered (1323–24) Sardinia, where later a revolt involved him in war with Genoa and Pisa. He was succeeded by his son, Peter IV.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.