While there's no official confirmation of their familial relationship, the following points suggest they might be:
* Shared Last Name: The same last name is a strong indicator of potential family ties.
* Similar Musical Genres: Both Carla and Carl were prominent figures in soul music, which can be a family tradition in some cases.
* Time Period & Location: They both were active in the music industry during the same era (1960s-1970s) and likely hailed from the same area (Memphis, Tennessee).
However, without official confirmation from them or family members, it's impossible to be 100% certain.