Aurands of Central Pennsylvania

My line descends from Johannes Aurandt, aka John Aurand, who came to North America in 1757 and settled in Berks County, PA. Later he moved to Northumberland County, where he was a member of the Committee of Safety during the Rev. War. My roadblocks are the wives of two of my Aurand ancestors: Catherine Vallentine who m. Samuel Aurand in Northumberland Co c. 1806; and Catherine Bradley who m. Samuel's son Henry in 1832 in Union Co, PA. Any help or suggestions greatly appreciated.