Nin Is A Girls Name Of Thai Origin. Perfect For Showing Your Daughter How Precious They Are, This Name Means "sapphire." Instantly Recognizable For Their Deep Blue Color, Sapphires Symbolize Innocence, Good Health, And Prosperity. The Sapphire Is Also The Birthstone For The Month Of September. Wherever Life Takes Them, Baby Nin Is Sure To Light Up The Room With Their Glowing Presence And Dazzling Personality.