You are correct that her father was Johannes Diehl.In my work on Diehl families I found three baptisms in Longswamp Reformed Church records for Philip and Maria Elizabeth Biery.Also seen as Biry, Bery,Bieri,Bohry, etc. 1. Maria Catharina Biery born not reported, baptized 23 OCT 1774, sponsored by Joh. Diebel (likely a mistranscription of Diehl) and Maria Catharina Keiser 2. Johannes Biry, b. 5 NOV 1776, bpt 12 NOV 1776, sponsored by Johannes Diehl and Elizabeth Muck. 3. Daniel Biry, b. 16 AUG 1779, bpt 21 NOV 1779, spons. Joh. & Anna Maria Flammer.
I did not know the Biery family moved to VA and would appreciate any details on that generation you can share.
Best, Ed Deal Researching Southeast PA Diehl-Deal-Dill families.