Hennis was in Hawkins, TN in 1840 US Census, no other names shown. There was a Burrell Lawson in Salisbury, Stokes, NC on 4 Aug 1800 US Census. There was a Burrell Lawson at Peters Creek, Stokes, NC in 1810 US Census.
A Clement Lawson was at Pipe Creek, Madison, IN at the age of 72y in 1850.