User blog comment:Redfork2000/Ask Dark Shadow and Black Gem/@comment-27873981-20171015021951/@comment-26888167-20171015230948

//No, only the "Shadow" part of his name comes from Shadow the Hedgehog. The "Dark" part is something I added on my own when naming the character, as most ponies have a name composed by two words. The "Shadow" part also comes from the fact that he's supposed to be King Sombra's nephew. (King Sombra is an official MLP character, by the way) And since "Sombra" is just shadow in spanish, it worked out pretty well.