James Johnston Clark
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James Johnston Clark (1809 - June 1891) was a Unionist politician in Ireland.
Clark lived in Largantogher House, Maghera, County Londonderry and was a Unionist Member of Parliament for County Londonderry from 9 March 1857 until 1859.[1] He was a member of the Carlton Club, London.[2]
Clark's grandson was James Lenox-Conyngham Chichester-Clark and his great-grandson was Prime Minister of Northern Ireland, Lord Moyola.