Harriet "Hatty" Bartholomew
little girl in "Tom's Midnight Garden" by Philippa Pearce
Henrietta "Hatty" Doran
character in Sherlock Holmes story "The Adventure of the Noble Bachelor"
Hatty Hattington (a box wearing a giant hat)
villain in video game "Battleblock Theater"
Hatty the Hamster
character in animated series "Ruff,Ruff, Tweet and Dave"