- 24 August 1938 - Randolph Cohen is born to Isaac and Thea Cohen in Greenwich, London.
- 9 November 1966 - Randolph marries Blanche Fitzsimmons.
- 27 February 1967 - Randolph and his wife move to Boulder, Colorado.
- 9 September 1967 - Randolph's first child, Homer Cohen, is born.
- 7 January 1970 - Randolph's second child, Ragnar Cohen, is born.
- 2 June 1972 - Randolph's third child, Tamara Cohen, is born.
- 19 March 1974 - Randolph's fourth child, Eros Cohen, is born.