Encyclopedias, Almanacs, Transcripts, and Maps
- Irene of Constantinople (d. around 921)
- Irene of Hesse-Darmstadt (1866–1953)
- Irene of Kiev (fl. 1122)
- Irene of Montferrat (fl. 1300)
- Irene of Santarem (fl. 7th c.)
- Irene of Spain (fl. 300s)
- Irene of the Khazars (d. 750?)
- Irene Paleologina (fl. 1279–1280)
- Irene, Chionia, and Agape of Thessalonica (d. 304)
- Irene, Sister (1823–1896)
- Irfan (fl. mid-800s)
- Irina (1895–1970)
- Irma of Hohenlohe-Langenburg (1902–1986)
- Irmengard (c. 800–851)
- Irmengard of Oettingen
- Irmentrude (d. 820)
- Irmingard of Zelle (c. 1200–1260)
- Irwin, Agnes (1841–1914)
- Irwin, Inez Haynes (1873–1970)
- Isaac, Joan (fl. 1300s)