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John Dalgleish Donaldson

John Dalgleish Donaldson

Father-in-law of Frederik, Crown Prince of Denmark
The basics
Quick Facts
Intro Father-in-law of Frederik, Crown Prince of Denmark
Countries Australia
Occupations Mathematician
Gender male
Birth 5 September 1941 (Cockenzie and Port Seton)
Spouse: Susan Moody
Children: MaryCrown Princess of Denmark
Education University of Edinburgh
The details

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.

Family and marriages

Donaldson was born at Port Seton, Scotland, the son of Peter Donaldson (1911–1978) and his wife Mary Dalgleish (1914–2002). In the early 1960s his parents and his older brother Peter and younger sister Roy, emigrated to Tasmania, Australia, where his father was captain of a large trading company.

On 31 August 1963, Donaldson married his first wife, Henrietta Clark Horne (1942–1997), at Port Seton. They emigrated to Australia in November of that year. They had four children, Jane Alison Donaldson (born 26 December 1965), Patricia Anne Donaldson (born 16 March 1968), John Stuart Donaldson (born 9 July 1970) and Mary Elizabeth Donaldson (born 5 February 1972), married in 2004 to Frederik, Crown Prince of Denmark.

In addition to British citizenship, Donaldson obtained an Australian citizenship in 1975.

Henrietta died on 20 November 1997, and Donaldson married Susan Elizabeth Horwood (born 1940) on 5 September 2001. She is a novelist and writes under the names Susan Moody, Susannah James and Susan Madison.


In 1963, Donaldson obtained a BSc degree in mathematics and physics from the University of Edinburgh. He also received a PhD degree from the University of Tasmania, where he was since 1967 Applied Mathematics Lecturer of the Department and on occasion Dean of the Faculty of Science until his retirement in 2003. Subsequently he has been professor of applied mathematics at the Korea Advanced Institute of Science and Technology (KAIST).

Donaldson was previously visiting professor of applied mathematics at several universities in Houston, Montreal, Oxford, from 2004 at Aarhus University and from 2006 also at the University of Copenhagen.

Honour and coat of arms

  • Doctorate, University of Tasmania, title conferred upon Dr J.D. Donaldson 1968
  • Grand Cross of the Order of the Dannebrog

With the marriage of his daughter Crown Princess Mary in 2004, Donaldson was honoured with the Order of the Dannebrog. In accordance with the statutes of the Danish Royal Orders, both he and his daughter were granted a coat of arms, this for display in the Chapel of the Royal Orders at Frederiksborg Castle. The main field of Donaldson's coat of arms is or tinctured and shows a gules MacDonald eagle and a Sable tinctured boat both symbolising his Scottish ancestry. The chief field is azure tinctured and shows two gold Commonwealth Stars from the Coat of arms of Australia, and a gold infinity symbol in between, symbolising his career as an Australian mathematician. Above the shield is placed a barred helmet topped with a gules rampant lion, which is turned outward. The lion is derived from the Scottish coat of arms and also from the arms of Tasmania and Hobart.

Coat of arms of John Dalgleish Donaldson.png

The coat of arms of The Crown Princess is almost identical to that of her father's, but a gold rose is depicted as her personal symbol, instead of the infinity symbol. The heraldic crown of a Crown Prince of Denmark is placed above her shield.


  • Chick, HL and Collis, KF and Donaldson, JD and Watson, JM, Professional development in mathematics for teachers: Who, what, why and how, 15th Biennial Conference of the Australian Association of Mathematics Teachers, Darwin, pp. 65–71. (1995) [Refereed Conference Paper]
  • John D. Donaldson and Donald J. Jezewski (1977), "An element formulation for perturbed motion about the center of mass," Celestial Mechanics and Dynamical Astronomy, Volume 16, Number 3.
  • Michael S. Roberts, John D. Donaldson, and Malcolm Rowland (1988), "Models of hepatic elimination: Comparison of stochastic models to describe residence time distributions and to predict the influence of drug distribution, enzyme heterogeneity, and systemic recycling on hepatic elimination," Journal of Pharmacokinetics and Pharmacodynamics, Volume 16, Number 1.
  • Wotherspoon, SJ and Donaldson, JD, Finite differences and internal tides-representing the boundary, Deep-Sea Research Part I, 43, (6) pp. 949–958. ISSN 0967-0637 (1996) [Refereed Article]

Notes and references

Other references

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