A family tree at ancestry.com shows the following information for Joseph but I wonder if the death year is incorrect since he was still enumerated in the 1880 census.

Joseph Weller
Birth: 3 Aug 1793 in Frederick, Frederick, Maryland, US
Death: 1 Aug 1879 in Clark Co., Ohio, US
Father: John Jacob Weller
Birth: 4 Jul 1770 in Creagerstown, Frederick, Maryland
Death: 26 May 1818 in Creagerstown, Frederick, Maryland
Mother: Susanna Miller
Birth: 26 Mar 1780 in Frederick, Frederick, Maryland
Death: 1807 in Hagerstown, Washington, Maryland

Married 29 Mar 1815 in Rockingham, VA:
Elizabeth Stephy 1795 – 1867

Children --
Samuel Weller 1816 – 1903
John Weller 1817 –
Catherine Weller 1819 – 1884
Sevilla Weller 1821 – 1912
Philip Weller 1831 –
William Weller 1833 –
Elizabeth Weller 1836 –

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No parents are listed for Susanna Miller but John Jacob Weller's parents are listed as:

Father: John Jacob Weller
Birth: 10 May 1739 in Hellam, York, Pennsylvania
Death: 27 May 1809 in Frederick, Frederick, Maryland
Mother: Anna Margaret Harbaugh
Birth: 10 Jul 1749 in Kreutz Creek, York, Pennsylvania, US
Death: 11 Apr 1795 in Frederick, Frederick, Maryland, US

Here is the URL for the whole tree but I don't know if you can see it unless you register with a Username and password or have a paid subscription.

http://trees.ancestry.com/tree/7834382/person/197623261?ssrc=