Raiden

Raiden is a Japanese word and name associated with thunder and lightning and with the thunder deity. Its Japanese sound is often approximated with a first syllable like “rye,” while some English-speaking families use a vowel like “ray.” That difference matters when introducing the intended pronunciation.

Video-game use has given Raiden another modern cultural association. Its resemblance to Aiden does not establish an Irish origin or the same meaning. Rai can be a personal short form. Families choosing for the Japanese connection may prefer to preserve that pronunciation rather than treating the name only as another modern ayden spelling.