Not sure if this is entirely related to your research, but my Brown research may be similar to yours. I have a Robert Fisher Brown Sr. [b. Nov. 8, 1759, Breda, Netherlands]. Parents were British [Scotch?] loyalist soldier [under Capt Johnstone] James Brown, and wife Catherine/Katherine/Catherina Fisher/Fischer [b. 1727, Schonhooven, Zuid Holland, Netherlands]. They were married in 1749, same place she was born. She may have died in 1776.
Catherine Fisher may have come to the port of Philadelphia, PA., via Rotterdam, Netherlands [then Eng.] aboard the British ship "Samuel" or "Adventure"/"Adventurer", in 1731.
Marshall
alien71121@netzero.com