Etymology: Derived from the Japanese elements 'rei' (零 or 領 or 礼), which can mean 'zero', 'command', or 'courtesy', combined with 'ichi' (一), meaning 'one' or 'first'. In this context, it is most likely interpreted as 'first' (ichi) in birth order, possibly using 'rei' as a phonetic variant or honorific prefix. The name may also be a stylized modern creation blending Sino-Japanese roots for aesthetic effect.