(06/10/1856-10/1924).
William was born in Ireland and died in Moora. William was the son of Gerald De Courcy and Elizabeth nee Brockman. William arrived in 1860 with his parents and married on 04/04/1888 at the Guildford Church of England to Flora Mary Barrett Lennard (07/05/1867-02/08/1958). Flora was the daughter of Edward Graham and Mary Ann nee Hardey. William's and Flora's children were Rose Elizabeth (1889-), Lucille Mary (1891-), Ethel Flora (1893-), William Edward De Courcy (1894-), Frederick St John (1896-), Alice Maud (1897-1898), Herbert Kitchener (1899-), Powell Roberts (1900-), Margaret Grace (1902-), Jocelyn O'Grady (1903-), George (1904-1904), James (1904-1904), Gwendolyn Mary (1906-), Thomas Henry Maynard (1908-) and Frances Dorothea (1910-). At sixteen years old, William owned a small boat and went to Shark Bay for pearl fishing for six months. William was also a swan farmer in 1878. He employed two ticket of leave men at "Herne Hill" from 1878 to 1879. In 1880 he went to Carnarvon, working for C. S. Brockman. J. Brockman moved to Bunbury for two years. He leased "Boolathana Station" for three years, then established "Yanyeareddy Station" with his brother at Lyndon River. He left his brother in charge in 1890 and farmed "Herne Hill" again and bought "Towera Station" in 1910. He was a member of the Swan Road Board and was Chairman for three terms. William was also Vice President of Pastoralists' Association and Member of Turf Club and Weld Club Residence "Mileura", Cottesloe. He was also educated in Bunbury.