Jane Nartare Beaumont (aged 9; born 10 September 1956), Arnna Kathleen Beaumont (aged 7; born 11 November 1958), and Grant Ellis Beaumont (aged 4; born 12 July 1961) were three siblings collectively known as the Beaumont children who disappeared from Glenelg Beach near Adelaide, South Australia on Australia Day, 26 January 1966.