Talk:Derpy/Gallery/@comment-75.130.161.60-20120612163317/@comment-124.148.211.230-20121125034446

In S01E11 (Winter Wrap Up), an unseen pony is referred to as Ditzy Doo. Some fans were quick to jump on this being the canon name for Derpy. Lauren Faust then stated on her Deviantart account that if Ditzy ever appeared, she'd have a different design to Derpy. This lead to fans either calling her Ditzy or Derpy.

Fast-forward to S02E14 (The Last Roundup) and Derpy gains a speaking role as well as being called by the name "Derpy" by Rainbow Dash. The Ditzy fans headcanon "Derpy" to be her nickname due to the character being Ditzy Doo in the production phase, but changed to Derpy as a ""tip of the hat" to fans.

At BronyCon, Amy Keating Rogers sang the extended version of "Smile, Smile, Smile". In this song, Pinkie Pie reveals Derpy's full name to be Derpy Doo.

"TL:DR Version": Derpy replaced Ditzy Doo, which lead some fans to referring to her as the later name. In the end, whichever one you use (Derpy Hooves, Ditzy Doo, or Derpy Doo) is up to personal preference, but the majority of the fandom use "Derpy".