- Irskine
- Irven
- Irvin
- Edith (between 1872 and 1873 - )
- Robert (between 1864 and 1865 - )
- Irvine
- Irving
- Irwin
- Isaac
- Isaacs
- Isler
- Israel
- Istead
- Isted
- Itter
- Ivens
- Ivers
- Iverson
- Ives
- Ivey
- Ivie
- Izant
- Izard
- Izon
- Izzard
- Jack
- Jackett
- Jacklin
- Jackman
- Jackson
- Jacobs
- Jacobsen
- Jacobson
- Jacomb
- Jacques
- Jacquess
- Jahn
- Jakeman
- Jakes
- Jakins
- James