I am also a descendant of Henry Addison Jefferson. I have heard that Martha "Patsy" Jefferson "could be his mother". A few months ago, I found a family tree (below) that indicates that a Martha (Patsy) Jefferson was born in 1804 and was the daughter of Archer (Archibald) Jefferson (born 1776). I can't remember which website!!! I am also very interested in knowing more about her. -----------
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# ID: I53427
# Name: Archer Jefferson
# Given Name: Archer
# Surname: Jefferson
# Sex: M
# Birth: 4 May 1766 in Henrico Co, Virginia
# Death: 31 Oct 1826 in Henrico Co, Virginia
# _UID: 13F6B1909CD847508023CA810529B230531F
# Change Date: 9 Jul 2006 at 20:39

Father: Peter Field Jefferson b: 4 Mar 1740 in Henrico Co, Virginia
Mother: Elizabeth Allen b: 7 Dec 1739 in Cumberland Co, Virginia

Marriage 1 Lavinia Ramsey b: Abt 1770 in Franklin Co, Virginia

* Married: 3 Jan 1798 in Franklin Co, Virginia
* Change Date: 9 Jul 2006

Children

1. Frances Jefferson b: Abt 1800 in Franklin Co, Virginia
2. Martha (Patsy) Jefferson b: 1804
3. William N. Jefferson b: Abt 1805 in Franklin Co, Virginia
4. Alexander Jefferson b: Bet 1811 and 1815 in Franklin Co, Virginia
5. Isaiah Jefferson b: Abt 1812 in Franklin Co, Virginia
6. Peter Field Jefferson b: Abt 1815 in Franklin Co, Virginia