When Nancy Blackburn was born in 1767, in Warrington Township, York, Pennsylvania, United States, her father, Moses Blackburn, was 21 and her mother, Mary McGrew, was 19. She married Obediah Underwood Sr. in 1785, in Newberry Monthly Meeting, York, Pennsylvania, British Colonial America. They were the parents of at least 7 sons and 3 daughters. She died on 15 September 1842, at the age of 75, and was buried in Glyde, North Bethlehem Township, Washington, Pennsylvania, United States.
English: habitational name from any of various places called Blackburn, but especially the one in Lancashire, so named with Old English blæc ‘dark’ + burna ‘stream’. This surname is found mainly in northern England.