The namesake of Heidern, the commander of the Ikari Warriors first introduced in Ikari III: The Rescue, comes from Wemm Heidern from the 1974 anime Space Battleship Yamato.
Contributed by DrakeVagabond
Outside of Japan the series' two protagonists, Ralf Jones and Clark Still, are named Paul and Vince, respectively. Despite this, they appear with their correct names in both The King of Fighters and Metal Slug series.
Contributed by Mass Distraction