I'm researching the descendants of Thomas Fewster/Feuster (1791-1866) and wife, Alice(1794-1878).They immigrated from England and arrived in Baltimore in 1830. From there, most of the family settled in Fayette County, PA.
It is possible that there was an older son/sons who remained in MD. About the same time, the surname begins to appear in Michigan and Ontario, Canada. I can't help but feel that there is some connection.
I have found the surname in various census reports as FEWSTER, FEUSTER, FUESTER, FOOSTER, FUSTER, FEASTER, FEISTER and FENSTER.