According to Connecticut Genealogy, Vol. II, pp 442-443, Thomas Barnum, son of Thomas, was born July 9, 1663 in Fairfield, Connecticut and removed to Danbury with his father's family. Other sources show him born at Norwalk on 9 July 1663; died at Danbury in 1731. The will of Thomas Barnum of Danbury was dated 17 Dec 1730 and proved 27 Dec 1730. The will shows sons Thomas (the eldest), Ephraim, Ebenezer, Joshua (4th and youngest); wife Sarah; daughters Sarah Hoyt and Esther Judd; grandson John Wilkes (his mother Susannah had a portion in her lifetime); youngest daughter Mary Barnum. Thomas left an estate valued at £190, 5s, 2p. (That amount is equal to about $45,500 in 2005 dollars).
Connecticut Genealogy shows his children as: Thomas; Sarah m. (perhaps Joshua) Hoyt; Ephraim m. Mehitabel; Susannah m. Wilkes; Ebenezer m. (by 1717) Abigail Skeels, daughter of John of Woodbury; Esther m. Judd; Joshua; Mary.