Sir Joseph Napier, 4th Baronet
Lieutenant Colonel Sir Joseph William Lennox Napier, 4th Baronet of Merrion Square, was a British baronet and soldier who served in both the First and Second World Wars.
Napier married Isabelle Muriel Surtees on 12 February 1931. He succeeded to the Baronetage of Merrion Square in 1915 on the death of his father, Sir William Napier, 3rd Baronet, and was succeeded by his son, Sir Robert Surtees Napier, 5th Baronet.