Back in 1961, audiences were introduced to one of the most wicked Disney villains ever created. Cruella De Vil, a clever play on "cruel devil," was originally based on the character from Dodie Smith's novel, The Hundred and One Dalmatians. She was an heiress and fashion designer with a violent obsession with Dalmatians.
Source:https://www.cbr.com/cruella-should-be-original-character/