The name Rudy is a girl's name of German origin meaning "famous wolf". Rudy and is often added to lists like Baby Names with Animal Meanings and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
Rudy hasn't yet enjoyed the comeback of cousin name Ruby, despite having been chosen by hip couple Sadie Frost and Jude Law, but it still could happen.
Rudy has a lot going for it as a usable-on-its-own nickname name, with the lively 'oo' sound found in Jude and Juno and all the popular Lu-starting names. And it was a heartthrob name back in the day when crooner Rudy (born Hubert) Vallee and Rudy/Rudolph (born Rodolpho) Valentino had ladies swooning, reaching as high as Number 299 in 1926.
It has most often been seen as an all-male name--except for little Rudy on The Cosby Show.