The suffix bottom seems to be entirely Yorkshire/ Lancashire-as is my real name (not a bottom though).
The genealogy of English names is fascinating, and until the 50s and social mobility and mass immigration was very area dependent.
For instance Celtic, Angles, Saxons, Vikings, and the appalling Normans have produced many names. The Romans were responsible for many place names, but possibly not surnames.
Incidentally I live fairly close to Six-mile bottom, and used to live near the Wallops (Nether, Middle and Up-I think-they are now very posh chocolate box villages.)
Great and Little Snoring even exist in North Norfolk-but as they say "Normal for Norfolk".
