Honoria Nutcombe founded the Society for the Reformation of Hags (FW).
Sometimes spelled “Honouria”
Believed Hags could change their dark ways
Other canon notes and references
Honoria was Wizard of the Month on Rowling's website for August, 2004 (JKR).
The description of hags in Fantastic Beasts and Where to Find Them would suggests that Nutcombe's efforts have not been successful.