Well its not exactly verifiable but here is a quote from Tiamats Plot Guide its not up to WPs standards but I trust this guy personallyOkay I finally found the official confirmation that his last name is in fact Schugerg well the katakana is Schugurugu but it probably properly translates to Schugerg  It was in a Capcom released SFZ Arcade Flyer  WhewHope that at least helps your doubts