Unfortunately, I know nothing of Zachariah's parentage. I know he was born Aug 17, 1785 in PA and had a brother named William who was born in 1788, probably in PA also. (William's birth source: John Hill Martin, Esq., History of Chester, PA, (Philadelphia, 1877), "CD-ROM," 252.) William did Dec 20, 1871 in Upper Darby, Delaware Co., PA. I don't know who his spouse was. :o( As for Zachariah, I know he died Nov 3, 1852 and was indeed married to Rachel Twaddell, daughter of William J. Twaddell and Deborah Pawling (making you one of my hubby's many cousins!). Rachel was born Feb 24, 1784 and died Dec 14, 1822. They had the following children: Deborah Ann Kirk (I suspect Deborah pawling's middle name was Ann also, but it's not been confirmed), Ann Kirk, William T. Kirk, James Kirk, Rachel Kirk, Susannah Kirk (b Jan 1817, d Apr 19, 1897), Mary Kirk, and John Kirk. Rachel Kirk married William Jeandell. That's all I know of their children, except for the new tidbit re: William's wife's name.
Now, if you need / want more on Rachel's parents, please let me know. I can post here or send that information directly to you. I don't know what info you're looking to add to your tree. If you're like me, it's practically anything and everything ... but I don't want to assume you want to be barraged with information. :o)
Erin Peters
genealogylover@hotmail.com