The Washington Ancestry, Charles A. Hoppin, 1932, Vol 1, p 55
John was the last one in this line of Washingtons to reside in Lancashire. It is stated in the issue of "The East Anglican Times" (England) of February 22, 1912, in an account of Hengrave Hall in Suffolk, that his brother-in-law, Sir Thomas Kytson (born 1485, died 1540), "was one of the most successful merchants in Tudor times, and he no doubt induced John Washington, his brother-in-law, to come to the Midlands to engage in the wool trade."
In honor of their marriage, the Kytson family anciently placed the Washington coas of arms, quartering the arms of Lawrence, in a window of Hengrave Hall. The window in which the arms still appear has been called "the Washington window".