| 151 | Iolanda of Hungary (1215-12 October 1251), parents: András II and Yolande de Courtenay |
| 152 | Isabel (-) |
| 153 | Isabel de Aragón (1491-), parents: Enrique "Fortuna" de Aragón and Guyomar de Portugal-Noronha |
| 154 | Isabel de Aragón (2 October 1470-23 August 1498), parents: Fernando II “el Católico” and Isabel I |
| 155 | Isabel de Aragón (1243-28 January 1271), parents: Jaime I "el Conquistador" and Iolanda of Hungary |
| 156 | Isabel de Aragón (1300-12 July 1330), parents: Jaime II and Blanche of Sicily |
| 157 | Isabel de Aragón (-), parents: Alfonso de Aragón and Juana Folch de Cardona |
| 158 | Isabel de Aragón (1323-1327), parents: Alfonso IV "el Benigno" and Teresa de Entenza |
| 159 | Isabel de Aragón (4 January 1271-4 July 1336), parents: Pedro III "el Grande" and Constanza of Sicily |
| 160 | Isabel de Aragón (-), parents: Pedro IV "el Ceremonioso" and Sibilla de Fortià |
| 161 | Isabel de Castilla y León (1283-24 July 1328), Vicomtesse de Limoges |
| 162 | Isabel de Espés (-before 1569) |
| 163 | Isabel de Navarra (1396-after 31 August 1435) |
| 164 | Isabel de Velasco (-) |
| 165 | Isabel Díaz de Haro (1335-1361), Señora de Lara, Señora de Vizcaya |
| 166 | Isabel I (22 April 1451-26 November 1504), Queen of Castile and León, parents: Juan II and Isabella de Portugal |
| 167 | Isabella Colonna (-), Dss di Trajeto |
| 168 | Jaime de Aragón (23 March 1384-24 August 1388), parents: Juan I "el Cazador" and Yolande de Bar |
| 169 | Jaime de Aragón (1291-1350/51), parents: Jaime II and Lucrecia |
| 170 | Jaime de Aragón (-after 22 May 1285), Señor de Segorbe, parents: Pedro III "el Grande" and María Nicolau |
| 171 | Jaime de Aragón (23 June 1374-1374), parents: Juan I "el Cazador" and Mathe d’Armagnac |
| 172 | Jaime de Aragón (1296-20 May 1334), Grand Master of the Order of St John of Jerusalem, parents: Jaime II and Blanche of Sicily |
| 173 | Jaime de Aragón (1378-young), parents: Martín I "el Humano" and María de Luna |
| 174 | Jaime Fernández de Aragón (around 1255/60-1285), Barón de Ejérica, parents: Jaime I "el Conquistador" and Teresa Gil de Vidaure |
| 175 | Jaime I (1321-15 November 1347), Conde de Urgel, parents: Alfonso IV "el Benigno" and Teresa de Entenza |
| 176 | Jaime I "el Conquistador" (1 February 1208-27 July 1276), King of Aragon, parents: Pedro II "el Católico" and Marie de Montpellier |
| 177 | Jaime II (1380-1 June 1433), Conde de Urgel |
| 178 | Jaime II (1243-29 May 1311), King of Mallorca, parents: Jaime I "el Conquistador" and Iolanda of Hungary |
| 179 | Jaime II (10 August 1267-5 November 1327), King of Aragon and Valencia, parents: Pedro III "el Grande" and Constanza of Sicily |
| 180 | Jaime III (15 April 1315-25 October 1349), King of Mallorca |