While we are trying to locate Joseph's birth ...

John Weller, 1720, Knockholt, Kent, m. Sarah, 1724, Knockholt (don't have marriage yet)
Children are:
Thomas, 26 Oct 1746
John, 23 Oct 1748
George, 6 Jun 1751
Sarah, 31 May 1752
George, 19 Jun 1757
Mary, 21 Apr 1760
Frances, 20 Jun 1762
Henry, 9 Jan 1765
To this point, I've only followed Henry who married Esther Ovenden, 1766, Westerham (so she says). They married 15 Apr 1792 in Westerham.
Their children are:
Henry, 10 Jun 1792
Jane, 17 Aug 1794
Lucy, 11 Jun 1797
William, 15 Mar 1801
John, 29 May 1803
Hester, 21 Sep 1806
Henry m. Elizabeth Pattenden
Children:
Amelia, 1826
Henry, 1829
Esther, 1832
Ellen, 1836
Amos, 1839
Lucy we know about....
John m. Sarah ?
and I've only one child for them, William, 1839. I've not followed John and Sarah or William any further, at this point.