The main content of BFBI.uk is a one-name genealogical study 'The BRUSH families of the British Isles'. But it also includes sections on other families linked somehow to my own particular BRUSH family. There is a full list of contents page but here are some key links:
The introductory section of the BFBI,if you want to read the whole history as if it was a book.
The roots of BRUSH families in the USA, c.1650
The English roots of the BLAKE family of Brisbane, Australia, c.1850
The 19th century WALLIS family in Westminster.