When Arnold John Greenwell Sr. was born on 6 May 1749, in St. Mary's, Maryland, British Colonial America, his father, Justinian Greenwell, was 67 and his mother, Mrs. Margaret Greenwell, was 50. He married Mary Thompson about 1783, in St. Mary's, Maryland, United States. They were the parents of at least 4 sons and 1 daughter. He died on 22 June 1799, in Nelson, Kentucky, United States, at the age of 50.
English (Durham and Northumberland): habitational name from Greenwell (Cumbria) or Greenwell in Wolsingham (Durham), Middle English grene ‘green’ + welle ‘spring, stream’. The name may sometimes have been confused with Grindle .
History: The main English family of this name came originally from Greenwell, Wolsingham, County Durham, where they are recorded as owning land as early as 1183.