George Woodford Thellusson was an Anglo-French merchant banker and Member of Parliament. He bought the Aldenham or Wall Hall property in 1799 and commissioned major works at the house before transferring it to trustees of his father's will in 1805.

The source evidence is strongest for Wall Hall or Aldenham Abbey and may not by itself prove that every part of the manorial lordship was included.

Research sources:
- Sir John Soane's Museum Collection Online, Wall Hall, Hertfordshire: new entrance front and rooms for G. W. Thellusson; Stephen Johnson, 'Lordship of the Manor of Aldenham, Hertfordshire'. — https://collections.soane.org/THES100849
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/George_Woodford_Thellusson