For anyone confused
Santa Claus, rendered as close as possible to English using legal Japanese sounds, is "sa n ta ku ro u su" (サンタクロース) (see https://jisho.org/word/%E3%82%B5%E3%83%B3%E3%82%BF%E3%82%AF%E3%83%AD%E3%83%BC%E3%82%B9)
This sounds very close to Thunder Cross: "sa n da a ku ro u su"...