User blog comment:Someone456/Giga-gargantuar or Giga-Gargantuar?/@comment-4902297-20121019031635

Hyphenated propernouns are only capped on the first letter (ie. Double-edge, Jack-in-the-box, etc.) so Giga-gargantuar is gramatically correct. For gramatical purposes, Giga-garantuer should be used.