| irrémédiablement perdu | irretrievably lost |
| irréparable | irreparable |
| irrépressible | uncontrollable |
| irréprochable | unblemished |
| irrépréhensible | unexceptionable |
| irrésistible | uncontrollable |
| Irrésistible Alfie | Alfie |
| irrésistiblement | uncontrollably |
| irrésolu | dubious |
| irrésolution | indecision |
| irréversibilité du phénomène | irreversibility of the phenomenon |
| irrévocable | final |
| irrévocablement perdu | lost beyond recall |
| irrévérence | disrespect |
| irrévérencieux | ill-mannered |
| Irtych | Irtysh River |
| Irulan | Irulan Corrino |
| Irun | Irun |
| Irurtzun | Irurtzun |
| Irvine Welsh | Irvine Welsh |
| Irving Berlin | Irving Berlin |
| Irving Fisher | Irving Fisher |
| Irving Langmuir | Irving Langmuir |
| Irving Stone | Irving Stone |
| Irving Thalberg | Irving Thalberg |
| Irwin Rose | Irwin Rose |
| Irwin Shaw | Irwin Shaw |
| Irwin Winkler | Irwin Winkler |
| Iry-Ro | Iry-Hor |
| Iráklion | Heraklion |
| Irène Jacob | Irène Jacob |
| Irène Joliot-Curie | Irène Joliot-Curie |
| Irène Némirovsky | Irène Némirovsky |
| Irène Papas | Irene Papas |
| Irénée de Lyon | Irenaeus |
| Irénée Ier de Jérusalem | Patriarch Irenaios |
| IS | IS |
| IS-IS | IS-IS |
| ISA | ISA |
| İsa Qəmbər | Isa Gambar |
| Isaac | Isaac |
| Isaac Abravanel | Isaac Abrabanel |
| Isaac Albéniz | Isaac Albéniz |
| Isaac Alfasi | Isaac Alfasi |
| Isaac Asimov | Isaac Asimov |
| Isaac Babel | Isaac Babel |
| Isaac Barrow | Isaac Barrow |
| Isaac Bashevis Singer | Isaac Bashevis Singer |
| Isaac Casaubon | Isaac Casaubon |
| Isaac de Bankolé | Isaach De Bankolé |
| Isaac de Ninive | Isaac of Nineveh |
| Isaac Deutscher | Isaac Deutscher |
| Isaac Doukas Comnène | Isaac Komnenos of Cyprus |
| Isaac Hayes | Isaac Hayes |
| Isaac Ier | Isaac I Komnenos |
| Isaac II Ange | Isaac II Angelos |
| Isaac Israeli | Isaac Israeli ben Solomon |
| Isaac Kleiner | Isaac Kleiner |
| Isaac Le Chapelier | Isaac René Guy le Chapelier |
| Isaac Leib Peretz | Isaac Leib Peretz |
| Isaac Levitan | Isaac Levitan |
| Isaac Louria | Isaac Luria |
| Isaac Mendez | Isaac Mendez |
| Isaac Merritt Singer | Isaac Singer |
| Isaac Newton | Isaac Newton |
| Isaac Okoronkwo | Isaac Okoronkwo |
| Isaba-Izaba | Isaba |
| Isabeau | Elizabeth |
| Isabeau de Bavière | Isabeau of Bavaria |
| Isabel Allende | Isabel Allende |
| Isabel Martínez de Perón | Isabel Martínez de Perón |
| Isabel-Clara Simó | Isabel-Clara Simó |
| Isabela | Isabela Island |
| Isabella Bird | Isabella Bird |
| Isabella Colbran | Isabella Colbran |
| Isabella Rossellini | Isabella Rossellini |
| Isabella Stewart Gardner Museum | Isabella Stewart Gardner Museum |
| Isabelle | Isabel |
| Isabelle Adjani | Isabelle Adjani |
| Isabelle de Bourbon | Isabella of Bourbon |
| Isabelle de Charrière | Isabelle de Charrière |
| Isabelle de France | Isabella of France |
| Isabelle de Gloucester | Isabel of Gloucester |
| Isabelle de Hainaut | Isabelle of Hainaut |
| Isabelle de Jérusalem | Isabella of Jerusalem |
