There is a will of Micajah Blanchard, dated 1764, page 56, N.C. Will Abstracts, 1760-1800, which lists, William, Micajah, Abner, Mary, Elizabeth and Christian.
He and Micajah Jr. are on the U.S. Census from 1820-1850, but I see nothing in 1860 or beyond. He was in the Edenton District in 1850.
There is a database of Chowan County, N.C. Cross Index to Deeds- Grantees 1696-1878, Vol B. There are transactions from 1762-1857 listed.
Micajah was a soldier in the Revolutionary War and should have records at the N. S. Daughters of the American Revolution offices.