JOHN BOON/Rhoda MILLER England > ___? > Maryland

John Boon married to Rhoda Miller of (London?), England.
Known children:
Charles Edward Boon born 1870 London, England,
married to Mary Ann Spann born 1875 in Balt. City, MD.
"Sam" Boon (sometimes lived in Liverpool, England).
Emma Louise Boon
Minerva "Minnie" Rhoda Boon

Searching for the ancestors and descendants of John and Rhoda (Miller) Boon.
Recognize any names?