From the 1758-1781 Loudoun Co Tithables by the Sparacios:
Lasswell, Moses - 1 tithable, List by Francis Peyton for 1758 for Cameron Parish
Laswell, Jacob, John Masson - 2 tithables, List taken by Richard Coleman for 1760
Lassfield, Jacob Moses - 1 tithable, List taken by Richard Coleman for 1760
Lasswell, Jacob Moses - 1 tithable, William West's Tithable List - 1761
Lasswell, Jacob, John Mason - 2 tithables, William West's Tithable List - 1761
Lasswell, Moses - 1 tithable, List of Tiths. taken 1768 Leven Powell, Gent.
Lasswell, Andrew - 1 tithable; 5 squirrel scalps, List taken for Shelburn Parish by Leven Powell 1771
Laswell, Andrew - 1 tithable, List taken by Leven Powell for 1775
Lasswell, Andrew - 1 tithable, List taken by Levin Powell, Shelburn Parish January 1777
Lasswell, Elias - 1 tithable, List taken by Levin Powell, Shelburn Parish January 1777
From the Loudoun Co Order Books:
Order Book B, 11 August 1762
[p. 33] Upon petition of Henry TAYLOR against Jacob LASSWELL for a debt due by account; Defendant acknowledged Plaintiff's demand for £3.10.6 to be just, and costs.
Order Book B, 15 April 1763
[p. 116] Upon petition of Nicholas MINOR, Gent. against Jacob LASSWELL for a debt due by account; Defendant failed to appear; Plaintiff to recover against Defendant £1.10.9 and costs.
Order Book B, 15 June 1763
[p. 165] Upon petition of James GOULDING against Jacob LASSWELL for a debt due by account; Plaintiff to recover against Defendant £3.1.7 and costs.
Order Book B, 12 September 1764
[p. 436] Indentures of lease and release between Thomas CAWDREY and his wife Mary to Joseph COOMBS proved by witnesses Stephen SOUTHARD, Stephen CANTREL and James LINDSEY and ordered to be recorded. To which Francis HAGUE objected having deeds of lease and release dated 28th & 29th of March 1745 from John LASSWELL and his wife Margaret for the same land which deeds were never recorded and on his motion is ordered to be certified.
Order Book D, 14 September 1768
[p. 123] Grandjury's Presentment against Jacob LASSWELL is dismissed.
Order Book E, 12 June 1771
[p. 159] The following hands are ordered to work on and clear the road from Leven POWELL's Mill to Fauquier County line, to wit, Francis PEYTON's tithables at his Quarter, Thomas GIBSON, Samuel HENDERSON, William OWEN, James LAMKIN, Moses LASSWELL, Elias LASSWELL, Andrew LASSWELL, Robert STEPHENS' tithables at his plantation in the mountains, and of which road Edmund COLLENS is the Surveyor.
Order Book F, 1 May 1773
[p. 16] Leven POWELL against Elias LASSWELL – in debt – agreed by the parties.
Order Book G, 14 April 1783
[p. 519] 1778 December 14th – Leven POWELL to furnish Andrew LASWELL with necessaries.