Armstrong Fisher Brady of PA

I am looking for the parents of Armstrong Fisher Brady. He was born in 1837 in Pennsylvania (per 1870 Census) and died on Sept. 13th, 1876, just shy of his 39th birthday. He is buried in the Allenwood Cemetery in Allenwood, Union County, PA.

Among what little we know of him is that he fought in the Civil War for the South, he was married twice and had one son by his first wife.

Please let me know if you have any information regarding who his parents are and where in Pennsylvania he was born in 1837.

Thank you!!