Found this marriage notice...
[Freeman's Journal, 6 Jan 1820]
On the 27th ult. in the Parish Church of Antrim, John Orr, Esq., of Harp-hall, to Wilhelmina, youngest daughter of the late William Orr, Esq., of Hurtetoot-house, in the county of Antrim.
Hurtetoot House is new to me, but I see looking at the map that "Hurtletoot" townland is next to Farranshane. So does this refer to William Orr the 'Rebel'? What's known about Harp Hall?