No, black people do not have the same type of surname. That is not what I said.
The OP is looking for somewhere to live, outside Zones one and two in London, with a predominantly black community.
She does not, however, say what black community she is looking for. Does she want West Indian Community or African community? What religion does she want the black community to be? There are so many permutations.
Not all black communities are the same, are they? How can anyone reply to her question about where they are and are they happy? If they are black muslim, they will be happy in a black muslim community. If they are of another religion, they would not be happy in a black muslim community, would they, and vice versa? There are enough black community organisations, clubs and meetings to satisfy most black people, I would have thought.
That is why I suggested she concentrate on finding a community which suited her social standing and education in the first instance, rather than an almost dedicated black community.
I didn't want to pry and ask about her race or religion, but I did suggest that if she looks on the ELECTORAL ROLE of a place she is interested in, that will give her the surnames of everyone registered to vote, and from the surnames, she will know if they are black and the country of their ancestors.
It is a good way of discovering like minded people if you want to choose colour over education. In my experience, I would say look for homes at the price you can afford where people are of the same socially and educationally, since a good school is on her list too. I would be very surprised if her child was the only black child in a school nowadays.
I suggested a new build estate, where everyone will pay the same or similar for a new home and everyone will be a stranger at first, and that helps. I have moved into three new builds out of the five I have bought. Everyone was new to everyone else, and they were mostly of the same social standing and education, such as university degrees, at least one in a house.
There is more likely to be equal finances too, if the homes are mostly of a price. I am very surprised at the new buildings which are going up in and around London, more than I thought at first.
If the OP does not like my suggestion, it doesn't matter one way or another. I do think, however, that posters who are not the OP should be rather more polite when they say they do not agree with something. My advice is free: take it or leave it.