Click for key
| I | Book and author | Other notes |
| Ida | Dotty by Erica S. Perl | |
| Irene | Brave Irene by William Steig | |
| Iris | How to Hide a Lion by Helen Stephens Iris and Isaac by Catherine Rayner | S |
| Isaac | The Very Helpful Hedgehog by Rosie Wellesley Isaac’s Dreamcatcher by Bonnie Farmer Iris and Isaac by Catherine Rayner The Rhythm of the Rain by Grahame Baker-Smith | |
| Isabel Isabella Izzy | Mine! by Hiawyn Oram The Girl of Ink and Stars by Kiran Milwood Hargrave Izzy Gizmo by Pip Jones and Sara Ogilvie | ! |
| Isadora | Isadora Moon books by Harriet Muncaster | S |
| Ivor | Ivor the Engine by Oliver Postgate | S |
