| ID | name | link | born | died |
|---|---|---|---|---|
| 2674 | Alfonso | Alfonso d'Aragona | ? | 1412 |
| 3223 | Alfonso | Alfonso III, Duke of Modena | ? | ? |
| 3735 | Alfonso | Alfonso of Bigorre | ? | 1260 |
| 5751 | Alfonso | King Alfonso I of Aragon and Navarre | ? | ? |
| 6090 | Alfonso | Alfonso | ? | ? |
| 5670 | Alfonso | King Alfonso VI of Leon and Castile | 1040 | 1109 |
| 805 | Alfonso | Alfonso VII of Leon and Castile | 1105 | 1157 |
| 2320 | Alfonso | Alfonso | 1144 | 1149 |
| 1275 | Alfonso | Alfonso VIII of Castile | 1155 | 1214 |
| 2420 | Alfonso | Alfonso II of Aragon | 1157 | 1196 |
| 846 | Alfonso | Alfonso IX of Leon | 1171 | 1230 |
| 839 | Alfonso | Alfonso II, Count of Provence | 1174 | 1209 |
| 5757 | Alfonso | Alfonso | 1184 | ? |
| 2464 | Alfonso | Alfonso of Molina | 1202 | 1272 |
| 849 | Alfonso | Alfonso X of Castile | 1221 | 1284 |
| 2486 | Alfonso | Alfonso Manuel | 1260 | 1276 |
| 6070 | Alfonso Tellez | Alfonso of Molina | 1262 | 1314 |
| 5991 | Alfonso | Alfonso de la Cerda | 1270 | 1333 |
| 6084 | Alfonso | Alfonso | 1286 | 1291 |
| 4761 | Alfonso | King Alfonso IV of Portugal | 1291 | 1357 |
| 1830 | Alfonso | Alfons XI of Castile | 1311 | 1350 |
| 1833 | Alfonso | Alfonso | 1359 | 1362 |
| 6546 | Alfonso | Alfonso | 1377 | 1377 |
| 4601 | Alfonso | King Alfonso V of Aragon | 1396 | 1458 |
| 6725 | Alfonso | Alfonso Enriquez | 1435 | 1485 |
| 2816 | Alfonso | Alfonso | 1453 | 1468 |
| 4980 | Alfonso | Alfonso II, Duke of Ferrara | 1533 | 1597 |
| 3224 | Alfonso | Alfonso d'Este | 1632 | 1632 |
| 270 | Alfonso | Alfonso IV d'Este, Duke of Modena | 1634 | 1662 |
| 1094 | Alfonso | Afonso VI of Portugal | 1643 | 1683 |
| 4166 | Alfonso Maria Francisco Antonio Diego | Alfonso , Duke of Galliera | 1886 | 1975 |
| 4197 | Alfonso Leon Fernando Maria Jaime Isidro Pascual Antonio | King Alfonso of Spain | 1886 | 1941 |
| 4198 | Alfonso Pio Eduardo Francisco Guillermo Carlas Enrique Eugenio Fernando Antonio Venancio | Prince Alfonso of Asturia | 1907 | 1938 |
| 4168 | Alfonso Maria Cristino Justo | Alfonso | 1912 | 1936 |
| ID | name | link | born | died |
|---|---|---|---|---|
| 4199 | Jaime Leopoldo Isabelino Enrique Alejandro Alberto Alfonso Victor Acacio Pedro Pablo Maria | Jaime , Duke of Segovia | ? | ? |
| 6065 | Fernando Alfonso | Fernando of Molina | 1242 | 1250 |
| 6066 | Bianca Alfonso | Bianca of Molina | 1243 | 1292 |
| 6068 | Juana Alfonso | Juana of Molina | 1245 | 1307 |
| 4202 | Juan Carlos Teresa Silvero Alfonso | Juan , Count of Barcelona | 1913 | 1993 |
| 4186 | Alexander Arthur Alfonso David Maule | Captain Alexander Ramsay | 1919 | 2000 |
