He certainly has too many wives, I don't know about children, and I'm not sure that's the correct family.
The Miles Files claim he was only married twice, 1) Hester Stevens (d. c. 1650), 2) Martha Lear (widow of NN Henry, sister of Col. John Lear of Nansemond County). They also only give him one son, Capt. Robert Pitt (mariner), who was Hester's son (b. c 1635, d. b 16 Jun 1670 - probably lost at sea).
Per the Miles Files, parents were William Pitt (b. c. 1575, probably a guesstimate) and Mary NN (b. c. 1580, guesstimated).
William's father listed as Thomas Pitt (b. c 1550, d. a 1613).
Whether these data match up with the Parliamentary Pitts is a good question - check vs. History of Parliament Online starting in 1604. (1640-1660 is still Potholed so no joy there.)