Hi,
Think you should look at the Whitworth Wills proved Canterbury which are on Ancestry.
Thomas Whitworth, probate 1790, leaves property to son William, and states that if any monies are unpaid re purchase of the Manor of Earls Barton they are responsibility of William my son. Also mentioned are my late brother William, Daughters Elizabeth Whitworth and Mary Whitworth.
William Whitworth probate 1821, mentions Elizabeth his wife, Sisters Elizabeth & Mary and William Whitworth, my relation of the Town of Bedford, Attorney. Does appear the relationship is not Nephew so probably distant cousin.
Does not answer your question, but obviously William of 1821 had no son, and Manor went to William
born 1799 Bedford.
There are lots of Whitworth wills, which may also help.
Spendlove