Scans of this pretend interview with Hezekiah Alexander can be found on the Find a Grave site of Hezekiah Alexander, with a close-up of the names and dates of the children on the Find A Grave site of James Robert “The Yeoman” Alexander.
"Hezekiah" doesn't give his own birth date, but he provides the following for his siblings:
Children of Margaret (McKnitt) Alexander:
Theophilus, born March, 1714, died in 1768
Jemima, born November 10, 1716, died early
Edith, born Jan. 10, 1718
Kezia, born May 9, 1720
Ezekiel, born June 17, 1725, died young
Jemima (second by that name) born Jan. 9, 1727, still living
Amos, born Jan. 13, 1728 and still living
John Knitt [sic], born June 6, 1733, still living
Margaret, born June 6, 1736, died young
Children of Abigail Alexander (claimed in this article to be the younger sister of Margaret McKnitt):
Elizabeth, born Nov. 17, 1746
Abigail, born May 24, 1748
Margaret, born April 30, 1750 and named in memory of Margaret (McKnitt) Alexander
Josiah, born Aug. 3, 1752
Ezekiel, born Oct. 21, 1754