火, read /hi/ and /ka/ is the kanji for 'fire' but it is not used alone in names. 火事沢 /ka ji sa wa/ for example would mean literally 'fiery valley' or 火神 /ka ga mi/ means literally 'fire...
火龍Hi ryū
Hi no akuma
メガン /me gan/ is the Japanese term for that name.
火災による破壊Kasai niyoru hakai