“The Brownists were a separatist sect founded by Robert Browne (1550 ?-l633 ?), the reputed first congregationalist, who boasted, on his death-bed, that he had been in thirty-two prisons during his religious warfare with the established authorities”. – Footnote by Austin Dobson.
The Brownists were English Dissenters or early Separatists from the Church of England. They were named after Robert Browne, who was born at Tolethorpe Hall in Rutland, England about the middle of the 16th century. A majority of the Mayflower passengers in 1620 were Brownists, and indeed the Pilgrims were known for 200 years as the Brownist Emigration.
Image, background from Wikipedia