Likely a modern phonetic creation echoing Japanese-style sounds, with no single fixed traditional etymology.
Yomii is a stylized form of the Japanese name Yomi (黄泉 or よみ), which carries one of the most mythologically resonant meanings in all of Japanese culture. In Shinto cosmology, Yomi-no-Kuni (黄泉の国) is the shadowy underworld — the land of the dead — where the goddess Izanami retreated after her death, as recounted in the eighth-century chronicles Kojiki and Nihon Shoki. The name thus carries the weight of Japan's foundational creation mythology, evoking both mystery and the deepest, most primordial cycles of existence.
Beyond the mythological reading, 'yomi' in Japanese also means 'reading' (読み), as in the reading of a text or the pronunciation of a character — a meaning tied to literacy, interpretation, and intellectual life. This dual resonance — darkness and learning, the underworld and the written word — gives the name an unusual poetic duality. The elongated '-ii' ending in Yomii is a contemporary stylization that softens the name's weightier mythological associations while marking it as distinctly modern.
As a given name, Yomii is rare and chosen by parents drawn to Japanese mythology, to names that carry deep cultural narrative, or to the sonic beauty of the double-vowel ending. It signals a parent who looked past surface convention into the extraordinary richness of Japan's literary and spiritual heritage, finding there a name both haunting and gentle.