Rumer Is A Girl’s Name With A Blend Of European Origins. In German, Rumer Derives From The Nickname ruomære, Meaning “braggart”—perhaps A Playful Reminder For Baby To Remain Humble No Matter How Amazing They Are. Rumer May Also Come From The German Forename Hrotmar, Meaning “fame.” With Roots In Middle English, Rumer Is A Rare Surname Meaning “wanderer,” While In Austrian, The Rumer Surname Means “famous Counselor.” Bruce Willis And Demi Moore Placed The Spotlight On This Eclectic Title By Naming Their Daughter Rumer Willis In 1988. If You Perceive Stardom In Baby’s Future Or Wish For Your Little One To Be A Free-spirited Wanderer, Rumer Is A Winning Choice.