Katherine Brimer was born on 1 January 1626, in Llanfihangel-helygen, Radnorshire, Wales, her father, John Brimer, was 26 and her mother, Mrs. Brimer, was 24. She married James Miles about 1653, in Radnorshire, Wales, United Kingdom. They were the parents of at least 4 sons and 1 daughter. She died in 1712, in Radnor Township, Delaware [then Chester County], Pennsylvania, United States, at the age of 86.