Alfonso II may refer to: Alfonso II of Asturias (791–842) Alfonso II of Aragon (1162–1196) Alfonso II, Count of Provence (1174–1209) Afonso II of Portugal (1185–1223), "the Fat" Alfonso, Count of Poitou (1220–1271), jure uxoris Alfonso II, Count of Toulouse Alfonso II of Naples (1448–1495) Alfonso II d'Este (1533–1597), duke of Ferrara from 1559 to 1597 de:Liste der Herrscher namens Alfons#Alfons II.