Namesakes
King Alfonso of Castile 1257-1273 
Hall-of-Famers:
1 baseball
(baseball) Al López 1977
Italian Presidents and Prime Ministers:
1 prime minister
(prime minister) Alfonso La Marmora 1864-1866
Nobel Prize Winners:
1 peace
(peace) Alfonso García Robles 1982
Notable Actors and Entertainers:
1 actor
Alfonso Ribeiro 1971-
Notable Athletes:
1 soccer
(soccer) Marcelo Díaz (a.k.a. Alfonso) 1986-
Notable Explorers and Adventurers:
1 explorer
Afonso de Albuquerque (a.k.a. Alfonso) 1453-1515
Notable Filmmakers:
1 director
Alfonso Cuarón 1961-
Notable Musicians:
1 singer
Bobby Farrell (a.k.a. Alfonso) 1949-2010
Olympic Medalists:
1 gold
(gold) Alfonso Menéndez Vallín 1992 archery - team
Oscar Award Winners:
1 director
(director) Alfonso Cuarón 2014; 2019 Gravity; Roma
Saints:
2 blessed, 2 saints
Blessed Alfonso de Baena ?-1570
Blessed Alfonso Pacheco ?-1583
Saint Alfonso Liguori 1696-1787
Saint Alfonso Maria Fusco 1839-1910
Spanish Kings and Queens:
13 kings
King Alfonso VI the Valiant 1072-1073 Castile
King Alfonso I the Warrior 1104-1134 Aragon
King Alfonso VII the Emperor 1126-1157 Castile
King Alfonso VIII the Noble 1158-1214 Castile
King Alfonso II the Chaste 1164-1196 Aragon
King Alfonso IX 1188-1230 Leon
King Alfonso X the Wise 1252-1284 Castile
King Alfonso III 1285-1291 Aragon
King Alfonso XI the Just 1312-1350 Castile
King Alfonso IV the Good 1327-1336 Aragon
King Alfonso V the Magnanimous 1416-1458 Aragon
King Alfonso XII 1874-1885
King Alfonso XIII 1885-1931