| Author Name | Profession | Nationality |
| Iain Banks | Writer | Scottish |
| Iain Glen | Actor | Scottish |
| Ian Allison | Scientist | |
| Ian Fleming | Author | British |
| Ian Gilmour | Politician | English |
| Ian Hacking | Philosopher | Canadian |
| Ian Hamilton Finlay | Poet | Scottish |
| Ian Harding | Actor | American |
| Ian Hart | Actor | English |
| Ian Jackson | Scientist | English |
| Ian St. John | Athlete | Scottish |
| Ibrahim Babangida | Statesman | Nigerian |
| Idi Amin | Statesman | |
| Ieva Laguna | Model | Latvian |
| Igor Ivanov | Statesman | Russian |
| Ilya Ehrenburg | Writer | Ukrainian |
| Immanuel Kant | Philosopher | German |
| Imran Khan | Athlete | Pakistani |
| Imre Lakatos | Philosopher | Hungarian |
| Ina Garten | Author | American |
| Indira Gandhi | Statesman | Indian |
| Indra Devi | Celebrity | Latvian |
| Ingvar Kamprad | Businessman | Swedish |
| Ira Gershwin | Musician | American |
| Ira Glass | Journalist | American |
| Ira Glasser | Activist | American |
| Iris Dement | Musician | American |
| Iris Johansen | Author | American |
| Irvin Kershner | Director | American |
| Irving Babbitt | Critic | American |
| Irving Caesar | Composer | American |
| Irving Fisher | Economist | American |
| Irving Langmuir | Scientist | American |
| Irving Layton | Poet | Canadian |
| Irving R. Kaufman | Judge | American |
| Irwin Edman | ||
| Isaac Albeniz | Musician | Spanish |
| Isaac Babel | Journalist | Russian |
| Isaac Barrow | Mathematician | English |
| Isaac D'israeli | Writer | British |
| Isaac Hanson | Musician | American |
| Isabel Allende | Writer | Chilean |
| Isabella I | Royalty | Spanish |
| Isabelle Adjani | Actress | French |
| Isabelle Eberhardt | Explorer | English |
| Isidore Ducasse Lautreamont | Author | French |
| Isla Fisher | Actress | Australian |
| Islom Karimov | Statesman | |
| Ismail Haniyeh | Politician | Palestinian |
| Isocrates | Writer | Greek |
| Israel Kamakawiwo'ole | Musician | American |
| Italo Calvino | Journalist | Italian |
| Ivan Allen | Politician | American |
| Ivan Illich | Sociologist | American |
| Ivan Lendl | Athlete | Czechoslovakian |
| Ivica Dacic | Politician | Serbian |
| Ivy Lee | Writer | American |
| Iyad Allawi | Statesman | Iraqi |
“Whoever removes the Cross and its interpretation by the New Testament from the center, in order to replace it, for example, with the social commitment of Jesus to the oppressed as a new center, no longer stands in continuity with the apostolic faith.”
“On the little money I had collected I lived in Berlin very cheaply, ate very cheaply. And already in 1920 I saved the first salaries I received to go to Munich.”