I was thinking about that suggested name popularity yesterday as it looked at first sight to be a significant result.
However, having thought about it I guess you need to put it into context. That is to say that, I am guessing, in the Muslim community Mohammed is a popular name due to its religious relationship and the importance of the religion to most Muslims.
Outside of this there is no similar name that would push the same kind of results, for White British People it could be John, Chantelle, Chardonnay, Fred, Emma etc etc and not Jesus, God(!), Mary etc. There is not a religious influence that pushes a single name above the rest and the desire to have a name influenced by religion does not, in my opinion, exist in the white communities.
So for that reason it suggest at first sight that it is the sheer numbers of Muslims (typical DM scare tactic) that drive the results whereas I suspect it is more linked to the preference for names in that community.
Just a thought