NameHannah Buffington 
Spouses
Birth16 August 1809
Memo(familysearch database PA Births and Christenings)
Birth, Parent-Proof, Designation notes for Daniel (Spouse 1)
Daniel Mertz is listed by Floyd and Meiser as a son of Jacob and Sarah Jury. Meiser says he was born about 1812 and married Hannah.
He was reported variously as born in 1812, 1810 and 1811 in Census which makes him Jacob’s oldest son.
In fact, his birth and baptism was reported in a family search database “PA Births and Christenings”. Born 16 Aug 1809, baptized 08 July 1810 at Salem Evangelical Lutheran, Killingers. Daniel is designated U1a.
Relocated and Census Tracking notes for Daniel (Spouse 1)
He was consistently in Dauphin County in Census though in several different places.
Death and Find-a-Grave notes for Daniel (Spouse 1)
I don’t know when he died. As of autumn 2015, he is not on find-a-grave.