The births of his children are after he was deceased I found a FAG for Abraham from Line Lexington where he had died with different dates
https://www.findagrave.com/memorial/52597392/abraham-detweiler
Also Family search has different dates
https://www.familysearch.org/tree/person/details/LBRT-8WZ
Hoping someone else has further information.
Kulp book page 30 just states he married Elizabeth Clemmer/Clymer