Abraham Alexander Sr, Chair of the Mecklenberg Convention, had a son, Abraham Alexander Jr, who has a daughter (Dorcas) Eliza Alexander, who married (William) Hamilton McClatchy Jr.
They had several children, four of whom are mentioned in Alexander family records. They may have had up to eight. I would dearly like to substantiate or disprove the children.
Known Children: Allen, Albert Alexander, Margaret Catherine, (Dorcas) Jane, Caroline, John Hamilton.
Possible children: Samuel Earl McClatchey, Spicy McClatchie Freeman
Samuel Earl McClatchey lived in NC (where the McClatcheys originated) and had a son name 'John Hamilton' -- the names 'John Hamilton' and 'William Hamilton' run extensively in the family.
Spicy McClatchie Freeman married Joshua/Josiah Freeman, and Joshua was living next door to Allen McClatchey for the U. S. Census 1850 in White Twp, Newton Co, AR.
My ancestor is Albert Alexander McClatchy Sr, who married (Frances) Catherine 'Frank' COLE, 18 April 1845 in Marshall Co, MS
This couple migrated to Round Top, Fayette Co, TX, with the Cole family, headed up by her father, William T. Cole, by 1860.
Their son James Franklin 'J. F.' MCCLATCHY born 22 May 1846 in Holly Springs, Marshall Co, MS m. Lucy Ann Alexander ROBISON, 22 June 1870 in Warrenton, Fayette Co, TX -- whom you mentioned in your post.
I am descended from Albert Alexander McClatchy Jr, brother of James.
The children of AA Sr and 'Frankie' his wife were:
James Franklin 'J. F.' MCCLATCHY born 22 May 1846 in Holly Springs, Marshall Co, MS
Mary Elizabeth 'Mary Jo' MCCLATCHY born 1847 in Holly Springs, Marshall Co, MS
Eliza MCCLATCHY born 10 February 1848 in Marshall Co, MS
Amelia Caroline MCCLATCHY born 7 September 1849 in Marshall Co, MS
Laura Cole MCCLATCHY born May 1851 in Marshall Co, MS
William Hamilton MCCLATCHY born 7 October 1853 in Marshall Co, MS
Albert Alexander 'A. A.' 'Jr' MCCLATCHY born 13 August 1855 in Marshall Co, MS
Infant Son MCCLATCHY born 26 November 1856 in Marshall Co, MS
(Nathaniel) DeWitt C. MCCLATCHY born 24 January 1858 in Marshall Co, MS
John Davis 'J. D.' MCCLATCHY born May 1859 in Marshall Co, MS
I have found perhaps half their descendants, and I would love to find more and would be willing to swap.
BTW, this family has another connection to the MDI -- the (WIlliam) Hamilton McClatchy Jr who married the granddaughter Eliza of Abraham Alexander Sr, had a sister, named Mary McClatchey, who married David Alexander, blacksmith, the son of Allen U. Alexander. I have not traced the blacksmith's family, but they are a branch of the Mecklenberg Alexanders.
Some of their descendants married cousins/distant relatives, making for quite a few Alexander interconnections.