O'Callaghan, Billy (22 June 2013). „Trying to unwrap the great Coetzee enigma“. Irish Examiner. "His Cape ancestry begins as early as the 17th century with the arrival from Holland of one Dirk Couché..."
Coetzee honoured in Poznan. Polskie Radio (10 July 2012). დაარქივებულია ორიგინალიდან — 17 თებერვალი 2019. ციტირების თარიღი: 12 January 2014. "His maternal great-grandfather was born in Czarnylas, Poland"
Easton, John; Friedman, Allan; Harms, William; Koppes, Steve; Sanders, Seth (23 September 2003). „Faculty receive DSPs, named professorships“. University of Chicago Chronicle. ციტირების თარიღი: 2 August 2009.
Coetzee honoured in Poznan. Polskie Radio (10 July 2012). დაარქივებულია ორიგინალიდან — 17 თებერვალი 2019. ციტირების თარიღი: 12 January 2014. "His maternal great-grandfather was born in Czarnylas, Poland"