(Reposting this from the Antrim board:)
Around 1918 my grandparents in Antrim borrowed (and duly repaid) money from Dr James Donnelly of Tyrone. I see from the Belfast Gazette that there was a Dr JD in Derrytresk in 1931, but have no other info.
Might just be a family friend, but does anyone recognise JD as a source of loans or mortgages?