I don't know if this will help but I had some Brownings in my family. Cassandra Browning, b. about 1800, probably in Culpeper Co., Va., daughter of Nicholas Browning, 1777-1849. She married my gggg-grandfather, Johnson McQueen. Nicholas was supposedly born in Culpeper Co. and died in Rappahannock Co. so these might be places to look for your Brownings. I just don't have any information on siblings of Cassandra. Richardd