The spelling of the Japanese name "Ryohei" is pronounced as "ree-yoh-heh" in IPA phonetic transcription. The sound "ry" in Ryohei is a combination of the Japanese sounds "r" and "y". The sound "oh" is pronounced as an elongated "o", while "heh" is pronounced with a soft "e" sound. One interesting aspect of Japanese writing is that it uses multiple scripts. The name Ryohei can be written in Kanji characters as 良平, or with Hiragana characters as りょうへい.
The word "ryohei" does not have a widely known etymology as it seems to be a Japanese given name rather than a common noun or term. The name "Ryohei" is composed of two kanji characters: "ryo" (涼) meaning "cool" or "refreshing", and "hei" (平) meaning "flat" or "peace". However, it's important to note that personal names often have unique meanings derived from individual interpretations or family traditions, so the etymology of a specific person's name may vary.