John K Northrop was the founder of Northrop Aircraft, Inc, now Northrop-Grummen, was an aircraft pioneer, and father of the flying wing. He was born in 1895 and died in 1981.
His father was Charles W Northrop , who is #598iii on page 271 of The Northrop-Northrup Genealogy published in 1908. If you have access to a copy of that book you can trace his line on back to the immigrant.
John K Northrop had a son and 2 daughters. I believe his son had 3 sons and 4 daughters.
Joseph S Northrop