There is a 23 year old Andrew L. Pitzer in the 1850 census for Roanoke County, VA. There are four Pitzer families in Roanoke in 1850. Madison (52), Andrew L. Pitzer (23), Jeremiah K. Pitzer (36) and Bernard (41).
Andrew has a wife (Martha, 19) and daughter (Virginia, 5 mo.)and is a farmer. He also apppears in the 1860 census for Botetourt County, VA.