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St. Clare John Byrne (1830-1915), Naval architect.
Lived part of his life in Hoylake and his office was 48 Castle St Liverpool. 
1830 Born the son of Charles Holtzadorf Byrne (1781-1853) and his wife Susa Ewing (1789- ).
1830 October 28th. Baptised at St. Peter's, Liverpool.
1851 Living at Kenyon Terrace, Birkenhead: Charles H. Byrne (age 69 born Ireland), Retired Ship Owner. With his wife Susan Byrne (age 62 born Scotland) and their children Isabella Byrne (age 25 born Liverpool), Annamaria Byrne (age 23 born Liverpool), and Sinclair Byrne (age 20 born Liverpool), Merchants Clerk. Two servants. 
1857 Manager, Iron Shipbuilding Department of Brassey, Peto and Co
1861 Living at 34 Devonshire Road, Bidston and Claughton, Cheshire: Susan Byrne (age 72 born Scotland, Widow. With her son St. Clare Jno Byrne (age 30 born Liverpool, Naval Architect. Two servants.
1867 December 5th. Marriage of St. Clare John Byrne, a shipbuilder, to Kate the daughter of Henry Chatteris at Christ Church, Norwood.
1868 12th September. The partnership between St. Clare John Byrne, James Humphrys (of Hull) and Frank Henry Pearson at Kingston-Upon-Hull, known as Byrne, Humphrys and Co was dissolved. It was continued as Humphrys and Pearson. 
1869 Birth of son Henry S. Clare Byrne
c1872 Birth of son Arthur Laird St. Clare Byrne
1874 Birth of son Leonard St Clare Byrne.
1891 Boarding at Stanley Road, Little Meolse, Cheshire: St. Clara Byrne (age 60 born Liverpool), Naval Architect. With his wife Kate Byrne (age 47 born London) and their son Arthur St. C. Byrne (age 19 born Birkenhead).
1915 December 13th. Died. Of 22 Drummond Road, Hoylake. Probate to Arthur Laird St. Clare Byrne.