King Ghidorah. King Ghidorah's name is composed of "King" (キング Kingu?) and "Ghidorah." The "Ghidorah" part of King Ghidorah's name comes from the Japanese word for "hydra" (ヒドラ Hidora), which is spelt very similarly to the Japanese katakana for Ghidorah. He wasn't referred to as "King Ghidorah" in an original American release of one of his movies until Godzilla vs. Gigan.