Col. Sir Thomas Gerard - Wrong parents?

Currently we show:

From the book, "The Baronetage of England, printed for John Stockdale, published 1806: Sir Thomas Gerard married Frances, daughter of Sir Richard Molineaux, Baronet. they had six sons and one daughter Frances. 1. William. 2. Richard. 3.Gilbert 4.Peter. 5. Thomas 6. John. The last four sons died unmarried. Sir Thomas was succeeded by his eldest son, Sir William.

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The Baronetage of England published in 1806 contains some notable errors. Thomas Gerard, fifth son of Sir Thomas Gerard, 2nd Baronet, and wife Frances Molyneaux, was born before 1608 in Newhall, Lancashire, England. He married Susannah Snow, daughter of Justinian Snow. He married Rose Newton. He followed his brother Richard to Maryland. Thomas Gerard died December 15, 1673 at Machodoc, Westmoreland, Virginia.

Links to additional material:

http://www.thepeerage.com/p41839.htm#i418384

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But I think this is incorrect.

According to Plantagenet Ancestry of Seventeenth-Century Colonists by David Faris, Thomas Gerard, Gent., lord of St. Clement's, Basford, and Westwood Manors in St. Mary's County, MD, who removed to Virginia and died testate in Westmoreland County, VA in 1673, was the son of John Gerard, Gent. and his wife Isabel. The book states that they are named in the marriage settlement of Thomas Gerard and Susanna Snow dated 21 Sept 1629.