John Dalgleish Donaldson (born 5 September 1941) is a Scottish-Australian professor and the father of Mary, Crown Princess of Denmark, the wife of the heir apparent to the throne of Denmark, Frederik, Crown Prince of Denmark.
- Occupation
- mathematician, university teacher
- Citizenship
- United Kingdom, Australia
- Born
- September 5, 1941
- Died
- April 11, 2026