- Ivan Vladimirovich Michurin
- Ivan Vladislavić
- Ivan Yakovlevich Bilibin
- Ivan Yakovlevich Franko
- Ivan Yakovlevich Vishnyakov
- Ivan Zakharovich Surikov
- Ivan Ⅳ
- IVAP
- Ivar Lo-priset
- Ivar Malinovski
- IVB
- I-V characteristic curve
- IV characteristic curve
- IVD
- IVDD
- Iversen
- Iversen-Beurling-Kunugi theorem
- Iversen theorem
- Iverson
- Iverson brackets
- IVFZ
- I. V. Girsanov
- I. V. Girsanov (1934—1967)
- Ivindo River
- IVOA