I think a lot of very MC posters are saying it's WC. I grew up in the East end of London, way before gentrification, very WC family and community. Not a single Elliott. Jack, Dean, John/Jonathan, Bill/y, Jamie, Tony, Darren, Steve, Tommy, Pete (rarely Peter), Warren, Lee, Ricky, even the odd Gary. Now all have sons called things like Charlie, Archie, Jordan, Jayden, Ronnie, Frankie.
We live in a different area now and DS goes to a MN approved Montessori nursery and his classmates are Noah, Jasper, Cassius, James, Henry, Theodore (Theo never Teddy).