The "S" in S Club 7 has been a topic of speculation for many years. According to several members of the group, the "S" stands for Simon, after the groups creator, Simon Fuller. However, the official line has always been ambiguous, and there are other theories as well. For example, some have suggested that the "S" is the first letter of the word "seven". Another theory is that the "S" was put into S Club 7 because it is the 19th letter of the alphabet, and Fullers success has been based on the number 19 (owning 19 Entertainment) . However, the members of the group have said that the "S" can be something for the fans to interpret for themselves. In summary, while there are different theories about what the "S" stands for, the most widely accepted explanation is that it stands for Simon, after the groups creator.