https://mayflower.americanancestors.org/william-brewster-biography
In 1985 and 1986 Jeremy D. Bangs published a three-part article presenting and discussing all known documents naming Jonathan Brewster in Leiden [MQ 51:161-67, 52:6-16, 57-63]. Bangs examined the claim made by the Dexters that Jonathan Brewster had an earlier wife and child while residing in Leiden and determined that the records cited by the Dexters did not pertain to Jonathan Brewster.