Bob,
I assume you mean 1646 & 1649 not the 1800s.
You could search the Registry of Deeds to see who held the land in the early years. The Registry of Deeds starts in 1708. The originals are in Dublin and there’s a duplicate set in PRONI. You can search by townland.
Looking at PRONI’s e-catalogue it looks as though the Atkinson family had some of the 2 townlands in the 1700s:
D2538/A/109 Marriage Settlement 1789 between William Atkinson, merchant, Moore Street, Dublin and Agnes Atkinson formerly Henderson, his wife, 1st part and John Rawden and Walter Young, Gentlemen, of Glaslough, Co. Monaghan, 2nd part; of Moyraverty, Aghory and Marlacoo, Co. Armagh.
LPC/319 is a lease dated 1700 involving a Thomas Black of Marlacoo Beg.
The undertakers who held O’Neilland barony in the Muster Rolls (c 1630) were Anthony Cope 3000 acres, John Dillon 1500 acres, Mr Waldrum 2000 acres Mr Stanhow 1500 acres, Francis Satcheurall 2000 aces, Richard Cope 2000 acres and Sir William Brownlow with 2500. I am not sure which covered Mullaghbrack parish. A bit more research required to work that one out.
I don’t see any lands in Mullaghbrack forfeit in the Down survey, following the 1641 rebellion. Looks as though Marlacoo remaine din the same hands.
