This name (Oborozukiyo or the misty moon) comes from a waka poem composed by OE no Chisato, 'There is nothing like a night in spring with a hazy moon, neither shining brightly nor clouded'.
この名は大江千里(歌人)の和歌「照りもせず曇りもはてぬ春の夜の朧月夜にしく（似る）ものぞなき」に由来する。