The homogenization and sanitation of Fairy Tales predate Disney. Though I'm fairly certain that names like Belle (Beauty and the Beast), Aurora, Phillip and Malecifent (Sleeping Beauty) originated with Disney. So the versions we see in Once Upon a Time are influenced by the Disney versions.Many of the fairy tales and other fictional characters being referenced are older than Disney itself, which has become something of a central clearing house for such things. It could be argued that many of these stories could have their roots in much older kinds of mythology that have been repackaged by Disney at a later time for children's consumption. I'm not a student of fairy tale history, but that would be my guess.
Ditto for the names of the Seven Dwarves: Grumpy, Doc, Sneezy, etc. Those were invented for the Disney version.