Jumping to the 19th century…
Presumably John Fivey Colhoun’s mortgage with John McClintock (1810) didn’t work out…?
Book 636 / Page 176 / Number 436581https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSHS-19K4-3?i=409&cat=185720Memorial of mortgage dated 20th Mar 1811 between John Fivey Colhoun of St Johnston, Co Donegal, Esq., on the 1st part; Anne Kinkead of Ballyholy [?] Co Donegal, widow, of the 2nd. For £200 Colhoun sold to Kinkead that part of Corncammon then in the occupation of John Chambers, Moses Craig, Michael McGinly, Samuel McChimmins [??], James Colhoun and Nancy Payne; also that part of Corncammon then in the possession of Mary Galaher [Gallagher] widow. Subject to a clause of redemption. Witnessed by John Alexander of Kinecally [?] and David White of Clashygowan [?] both of Co Donegal, gents.
This may be a descendant of John, son of John Colhoun (d. c1755) because he owns the part of Corncammon which was previously leased to Rev. Samuel Rankin.
Book 786 / Page 479 / Number 532014https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSJ7-S9SG-C?i=291&cat=185720Memorial of marriage settlement of John Colhoun of Corncamon, Co Donegal, Esq, and Miss Elizabeth Church, one of the daughters of John Church late of Oatlands, Co Londonderry, deceased. Dated 8th Oct 1823. John Colhoun on the 1st part; Elizabeth Church on the 2nd; Isaac Colhoun of the City of Derry on the 3rd; Michael Harrison of Ballymena, Co Antrim, Esq on the 4th; and John Church of Grove Co Londonderry Esq and Stafford Church of Ballymena, Co Antrim, Esq, of the 5th. Whereby John Colhoun who was seized in fee of part of Corncamon; and Elizabeth Church was entitled to one eleventh share of the money produced by the sale of the lands of Ballygown, Co Tyrone and the lands of Drumagardna, Co Londonderry, soon to be sold by decree of the Court of Chancery – said money to become the property of John Colhoun, and he is to charge the lands of Corncamon with a jointure of £80/pa payable to Elizabeth in her widowhood. A common recovery is necessary to carry this out, so John Colhoun grants to Isaac Colhoun the lands of Corncammon formerly possessed by the Rev. Samuel Rankin and his undertenants and then in the possession of said John Colhoun and his undertenants, lands to be held in trust for the purposes mentioned. Deed and memorial witnessed by John Church of Coleraine, Esq., and Thomas Colhoun of Strabane.
I’m guessing Mary was probably John’s mother in this one…?
Book 797 / Page 30 / Number 538165https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSJ7-Q9H6-8?i=21&cat=185720Memorial of a deed dated 1st Oct 1824 between John Colhoun late of Corncammon, Co Donegal and now of Strabane, Co Tyrone on the 1st; Mary Colhoun of Strabane aforesaid of the 2nd. John granted to Mary an annuity of £30 payable out of the lands of Corncammon now in his possession, for and during her life. Witnessed by Samuel Colhoun of Strabane, attorney at law, and Thomas Colhoun of Strabane, gent.