I noticed there were two profiles for Andrew Armstrong (1576-1671) Andrew Armstrong and merged them. geni.com led me on to a few other merges, culminating in William Armstrong, Sr. (1585-1649) Col. William 'Christie's Will' Armstrong who ended up with two fathers, Christopher C. Armstrong (1526-1606) Christopher ‘John's Christy’ Armstrong and Alexander Armstrong (d. 1510) Sir Alexander de Armstrong, 6th Laird of Mangerton I believe the link to Alexander is wrong on the following grounds:
(1) A man who died in 1510 cannot have had a son who was born in 1576. Nor is there anything odd about the date 1510 as Alexander’s father David Armstrong David Armstrong is recorded as dying in 1488. For a man to be born 88 years after the death of his grandfather would be unusual.
(2) The information in the “About” field for William Armstrong, Sr. refers to his father as Christopher.
(3) John Armstrong, ‘The Pedigree of the Family of Armstrongs’ (from internal evidence written in 1754; the typescript copy I have seen, National Library of Ireland Ms. 5216, includes some later information): this John describes himself as son of Andrew Armstrong (1669-1717), this Andrew as son of Thomas, this Thomas son of Andrew (b. 1576), this Andrew as nephew of William of Fermanagh, this William as son of Christopher, laird of Maingerton.
(4) Hundreds of contributors to ancestry.co.uk have created trees with William as son of Christopher and not one with William as son of Alexander.
Alexander may well have had a son William with different dates. And the brothers Thomas (d. 1548) Thomas de Armstrong, 7th Laird of Mangerton, John (d. 1577) Sir John Armstrong, of Gilknockie, Christopher Christopher Armstrong, George George Armstrong, Alexander Alexander Armstrong, and Robert Robert Armstrong would be brothers of that William, as the only two with dates sound quite likely to be sons of a man who died in 1510. The only brother of William mentioned by John Armstrong in his manuscript is an unnamed brother, father of Andrew (b. Maingerton 1576) and therefore clearly John (1545-1628) John Armstrong.
In the subsequent generation, I have left some duplicates where I have no information as to which might be correct, and hope that another researcher will be able to sort them out. John Armstrong’s manuscript mentions in this generation only Andrew, Edmund, Thomas, William, Robert, John, Eleanor, Anne, Michael, Archibald, and three unnnamed daughters for Andrew (b. 1576), and John and Alexander as sons of William. Of these, Andrew, Edmund, and Archibald are mentioned in Burke’s Peerage and Baronetage.
In the meantime William Armstrong Sr. is left with two fathers, and this requires one of the geni.com experts to sort it out. But it would obviously be helpful if any readers contributed additional information which would enable the splitting of the tree to take place on the right basis.