Robb Is An Adorable Respelling Of The Boys Names, Rob And Robert, Meaning "bright Fame." Robb Is Rooted In Old German And Hit Its Peak In Popularity In 1968, Along With William, Mark, And Christopher. Although It Hasnt Made A Comeback Yet, Perhaps Thats For The Best. That Illusive Extra “b” Will Give Baby An Air Of Mystery! Robb Could Also Be Used As A Short Form For Robbie, As In Our Dearly Departed Robbie Coltrane, Who Brought _Harry Potter_s Loveable Hagrid To Life.