Marjorie, Zachariah isn't my direct line and I haven't worked on Kennetts for some time but hope to help in some way.
There were several Zachariahs and I'm unsure exactly how they fit but this is what I have in my notes.
There was a Zachariah that was in the Battle of Point Pleasant. He was born about 1752.This is according to the Kennett book by Don Kennett. Probably not the one that married Frankey Pollard because there isn't a Zachariah on the Personal Property Tax List for Bedford until 1793.
Zachariah Kennett & Frankey Pollard married in 1798.
I have notes from a Franklin Co., VA Chancery Case 1853-037. FRANCIS FERGUSON BY ETC vs JEREMIAH FERGUSON ETC. Francis Ferguson sues by Zachariah Kinnet her next friend. She is the wife & was legally married to one Jeremiah Ferguson formerly of County of Franklin VA. Husband Jeremiah Ferguson has abandoned & deserted her - gone to parts unknown - Been gone five or six years - left destitute - dependent upon kindness of neighbours and the labour of an aged and infirm father.The case concerns a tract of land on Nicholas Creek.I don't recall any of the details but it somehow involved a Robert A Scott and also involved interest from 1st of January 1847. Frances might have been trying to sell a tract of land that belonged to Jeremiah Ferguson.Sorry that my notes aren't a little better.
This seems to fit with the following marriage: Ferguson, Jeremiah and Frances Kennett, dau. Zechariah, Aug. 17, 1830.Sur. Hullen Scott.
Franlin Co, VA Death Records 1853 - 1896 by Nell Hailey Kennett, Zachariah D. (white male) [farmer] d. 26 Nov. 1881 Franklin Co. of physical debility, aged 73 yr, s/o Joseph & Isabella Kennett, b. Bedford Co., sp of Frances Kennett, Charles Spury physician reptd.
I've often wondered if this could've been Nehemiah D. Kennett.In any event, if the age is accurate, he couldn't have been the Zachariah that married Frankey Pollard and he probably isn't the same Zachariah in the chancery case because it was stated that the father of Francis was aged and infirm.
Zachariah and Frances do seem to be confusing.Hope this will shed a little light on them. Pat