Eisei m Japanese (Rare)Ei means "Honour, Glory, Flourish, Prosper", "Sparkle of Jewelry, Crystal Ball", "Calyx, England, Outstanding, Hero, English", "Lengthy, Long, Eternity, Everlasting", "Excellent, Outstanding", etc. Sei means "Dot, Star, Mark, Spot", "Become, Turn Into, Reach, Elapse, Get, Grow" "Life, Genuine, Birth", or "Holy, Master, Priest, Sage, Saint".