The information that I have been able to find is that Joseph was the son of "unknown" Alexander, and "unknown" was the son of another "unknown" Alexander.He was the son of Moses Alexander.Moses was the son of Moses Alexander who was born abt. 1690 in Cecil Cty., MD>He married Mary Wallace about 1720 in Cecil Cty., MD.She was born abt. 1700 in Cecil Cty. and died 10/25/1758 in Cecil Cty. Their children were:
Daniel b. Abt. 1720 ??? Alexander Mark Alexander, b. Abt. 1735 Moses, b. Abt. 1735 Abraham Alexander b. Abt. 1735 Zebulon Alexander, b. abt. 1730 Nathaniel b. abt. 1720 James Alexander b. unknown Priscilla Alexander, b. Abt. 1721 Mary Alexander, b. Unknown Ruth Alexander, b. Abt. 1723
I realize that 3 of themhave the approx. same birth year but I got all of this off of an Internet site.