Hello - I have some info on Thomas Blalock (1597-1660). He may also have spelled the name as Blacklock. Thomas and Rachel's children were Thomas II (1628-1677), William, John, and Rachel II.
Thomas II married Sarah Black and had Thomas III.
Sarah died and he married Anne Christian Scott. Thomas and Anne's children were Charles William, John William (1671-1745), and Anne.
John William married Mary Terrell, she died with no children. He then married Elizabeth Millington and their children were John William II, Anne, William, Millington, David, and Elizabeth.
I am currently doing family research and I believe I am descended from Millington Blalock.
This information came from a book "Blalock and Related Families" by Delton D. Blalock 1988.
I hope this was helpful. You might also check out the Church of Jesus Christ of Latter Day Saints Family Search Website
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www.familysearch.org]
Cheryl Blalock
San Antonio TX USA
cherry2774@yahoo.com