The Ponca Museum and Library houses artifacts, historical archives, a Tribal Library, and a Community Learning Center, and Culture Department offices.
HOURS AND LOCATION
Monday – Friday, 8:00 am to 4:00 pm
Ponca Tribal Museum and Library
88915 521 Avenue
Niobrara NE 68760
This sounds like a place to approach for help,with local genealogy and history. They may be able to point you to local people who are knowledgeable about local families. A library May have a newspaper obit.