As far as I can see by the references I have found John Braye & Anne Wharton had no children, the title went into abeyance after his death.
He possibly was not married to Margaret Sandes as there is another Richard Bray who did marry Lady Margaret Bray , possibly some confusion as he was also married to a Joan.
I think Richard Bray & (Joan Saunders) Joan Bray (Unknown) may have been parents of John Bray, of London
Are they the same?
John Bray http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=48316211
Margaret Haslonde Bray http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=48316131
Mary Beth Bray Whitney http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=46343036
Bill
John Bray at Find A Grave is the same as John Bray, of London a link is listed on his Profile, but Find A Grave does not list his parents.