Hi there
As far as I know, Ballylough is part of Annaghanoon townland near Donaghcloney. Ballylough Road is off the Banbridge to Lurgan Road, on the left just before you come to the turn off on the right down Moygannon Road to Donaghcloney.
The Penningtons were a well known family who lived in Annaghanoon townland. Samuel Pennington was the linen damask manufacturer. He is on the 1901 census aged 56, a widower living alone and belonging to the Church of Ireland. Same again for the 1911 census, where he is 65. He died in 1919.
Samuel M Pennington and William T Pennington, both of Annaghanoon, signed the Ulster Covenant in 1912, at Waringstown Orange Hall.
The Penningtons were active in Donaghcloney Church of Ireland Parish from at least 1840 onwards, many of them being Churchwardens:
1840 William P, 1844 Thomas P, 1859 Thomas P, 1866 Samuel P, 1884 Samuel P. This information comes from the book "An Ulster Parish: being a history of Donaghcloney, Waringstown" by Edward Dupre Atkinson, published in 1898.
There was an Elizabeth Pennington from Ballylough whose parents were John Pennington, a farmer, and his wife Jane, and she was baptised in Seapatrick Church of Ireland, Banbridge on 23 June 1833. There is also an Eliza Pennington from Ballylough, father John, who marries a man called Lindsay Little from Manchester in Donaghcloney Presbyterian Church in 1859. One of the witnesses is Thomas Pennington. There are other Penningtons associated with Donaghcloney Presbyterian Church and there is at least one Pennington grave there with family members who passed away between 1945 and 1960. I have a photo but I'm not sure if I'm allowed to post that?
Hope this is helpful!