拉麦士 is an alternative transliteration not found in standard reference works. The most common Mandarin renderings are
拉美西斯 (Lāměixīsī) for the Egyptian pharaoh Ramses, and
拉麦 (Lāmài) for the biblical Lamech (descendant of Cain in Genesis 4).
拉麦士 likely arose in a specific fan-translation or older publication.