James Rolston Lonsdale (31 May 1865 – 23 May 1921) was Unionist Member of Parliament (MP) for Mid Armagh from January 1918 until his death.
[1] He succeeded his brother John to this constituency on the latter's elevation to the Lords as Baron Armaghdale.
[2] The son of James Lonsdale, DL, he was educated at The Royal School, Armagh and Trinity College, Dublin.
[3] There is a memorial to Lonsdale in the south aisle at St Patrick's Cathedral, Armagh.
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