Trendall was the geologist on the 1951-52 and 1953-54 South Georgia Survey expeditions led by Duncan Carse.
Isadora Duncan | Duncan Sandys | Arne Duncan | Duncan, British Columbia | Seymour Duncan | Sandy Duncan | Iain Duncan Smith | Duncan Hines | Duncan Edwards | John Duncan | Duncan MacLeod | Duncan | John Duncan (artist) | Adam Duncan | Raymond Duncan | Duncan Patterson | Duncan Hunter | Duncan Grant | Duncan B. Forrester | Arthur Duncan | Adam Duncan, 1st Viscount Duncan | William Duncan Strong | Mal Duncan | Duncan Sheik | Duncan Jones | Duncan Fletcher | Duncan Fallowell | Duncan Campbell Scott | Duncan Campbell | Big John Duncan |
Surveyed by the South Georgia Survey (SGS) under Duncan Carse in the period 1951-57, and named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Sigurd Risting (1870-1935), Norwegian whaling historian; secretary of Norsk Hvalfangerforening, 1918-35, and editor of Norsk Hvalfangst-Tidende, 1922-35.