Jacob Welker was born in 1832 in Union Township, Knox County, the son of John and Elizabeth (Gaumer) Welker Sr.
At the age of 21, on June 2, 1853, he was married to Lucinda S. Casper (1835- ? ). Justice of the peace Joseph Pinkley performed the nuptials.
Their three known children were Clement B. Welker, Ardell Welker and John Adam Welker.
Following the migration pattern of Jacob's brother Dillon, the family moved to Iowa in 1857; back to Knox County in 1863; and thence to Dallas City, Hancock County, IL (1869). When his father died in 1869, Jacob was named in the will.
Jacob passed into death in about 1890 in Dallas City.
~ Son Clement B. Welker ~
Son Clement B. Welker (1858- ? ) was born in about 1858 in Iowa.
~ Daughter Ardell Welker ~
Daughter Ardell Welker (1861- ? ) was born in about 1861 in Iowa.
~ Son John Adam Welker ~
Son John Adam Welker (1866- ? ) was born in 1866 after the family returned to Knox County, OH.