It is with profound sadness that Queen Margrethe II of Denmark announced the death of her father, Professor John Dalgliesh Donaldson, who passed away at the age of 84 in his hometown of Hobart, Tasmania, Australia. The solemn announcement was made on the morning of April 12th, sending ripples of sympathy throughout the Danish Royal House and the international community. The Queen, in a deeply personal statement, conveyed the immense weight of her grief, expressing, "My heart is heavy and my thoughts are grey. My beloved father has died." She further articulated the enduring legacy of her father’s influence, stating, "I know that when the grief subsides, the memories will light up and what will remain the strongest is the love and the gratitude for everything he gave me and taught me."
Professor Donaldson had been unwell for some time, a fact that cast a shadow over Queen Margrethe’s recent, highly successful State Visit to Australia in March. This visit marked her first to her native land since her husband, King Frederik X, ascended to the Danish throne in January 2024. The Queen’s return to Hobart was met with an outpouring of public affection, with large crowds gathering to welcome her back to her childhood city. During this poignant visit, Queen Margrethe was able to spend “several good and present moments together” with her father, cherishing this precious time. Professor Donaldson is to be buried in Australia, where his family will hold a private memorial service to honour his life and legacy.
A Life of Academia and Royal Support
John Dalgliesh Donaldson’s life was one marked by intellectual pursuit and unwavering support for his daughter’s remarkable journey to the Danish throne. Born on September 5, 1941, in Port Seton, East Lothian, Scotland, he was the son of Peter Donaldson and Mary Dalgliesh. It was his mother’s name that he would later bestow upon his youngest daughter, Crown Princess Mary, highlighting a deep familial connection and a tradition of honouring ancestry.
In 1963, Professor Donaldson, alongside his wife Henrietta Horne and several other family members, embarked on a new chapter, emigrating to Tasmania, Australia. There, he carved out a distinguished career as a Professor of Applied Mathematics, contributing significantly to his field. His wife, Henrietta Donaldson, passed away in 1997. Professor Donaldson later found companionship again, marrying Susan Horwood, a novelist known by her pen name Susan Moody.
Professor Donaldson’s familial legacy extends beyond his academic achievements. He is survived by his second wife, Susan, and his four children from his first marriage to Henrietta Horne: John, Jane, Patricia, and of course, Mary, the Queen of Denmark. He was also a proud grandfather, with his grandson, Crown Prince Christian of Denmark, representing the future of the Danish monarchy.
A Journey to the Crown
Professor Donaldson played a pivotal, albeit often behind-the-scenes, role in his daughter’s ascension to royalty. He was a constant source of strength and calm, notably present at her side when she became Crown Princess of Denmark upon her marriage to Crown Prince Frederik in May 2004. His calming presence was particularly evident as his daughter made her way to the church, a moment etched in the collective memory of the Danish Royal Family. While he was unable to travel to Denmark to witness her formal coronation as Queen, Queen Mary’s profound connection to her father was evident in her choice to mark her first birthday as Queen of Denmark with a photograph that included him, a testament to his enduring importance in her life.

Supporting Data and Context
The passing of Queen Margrethe II’s father comes at a significant juncture for the Danish monarchy. The recent accession of King Frederik X and Queen Mary to the throne in January 2024 marked a new era for the kingdom. Professor Donaldson’s death, therefore, represents not only a personal tragedy for the Queen but also the loss of a key figure from the formative years of the modern Danish Royal Family.
The State Visit to Australia in March 2024 was a landmark occasion, symbolizing the deep ties between Denmark and Australia, and highlighting Queen Mary’s unique position as the first Australian-born Queen Consort in the Danish monarchy’s history. Her ability to connect with her roots and family during this visit, even amidst her father’s declining health, underscores her remarkable resilience and dedication.
Official Responses and Public Condolences
The Danish Royal House has established an online condolence book, allowing the public to express their sympathy and share their tributes to Professor Donaldson. This initiative reflects the deep respect and affection held for the Royal Family and the individuals who form its core. While official statements from heads of state and other royal families are expected to follow, the immediate outpouring of sympathy from the Danish public and those who followed Queen Mary’s journey from Australia to the Danish throne is a testament to the widespread impact of Professor Donaldson’s life and his daughter’s remarkable story.
Broader Implications and Analysis
The death of Queen Margrethe II’s father, Professor John Dalgliesh Donaldson, carries several layers of significance. On a personal level, it is a profound moment of grief for the Queen, who has consistently spoken of her father’s formative influence. The loss of a parent, particularly one who played such a crucial role in her life’s journey, is a deeply personal experience that will undoubtedly shape her as she continues her reign.
From a broader perspective, Professor Donaldson’s passing also represents the closing of a chapter in the history of the Danish monarchy. He was a bridge between Queen Mary’s Australian heritage and her life as Queen of Denmark. His life story, from his Scottish origins and emigration to Australia, to his academic achievements and his daughter’s royal destiny, is a unique narrative that has captivated many. His influence on Queen Mary, particularly her grounding and her ability to navigate the complexities of royal life while remaining connected to her roots, cannot be overstated.
The fact that Professor Donaldson was unable to attend his daughter’s coronation as Queen, but was present for her investiture as Crown Princess, highlights the passage of time and the sometimes-unforeseen circumstances that shape family life, even for royalty. His enduring presence in Queen Mary’s life, symbolized by the photograph chosen to mark her first birthday as Queen, speaks volumes about the strength of their bond.
The timing of his passing, shortly after a significant State Visit where he was able to spend time with his daughter, offers a measure of solace, allowing for precious final moments of connection. This period of intense public and personal reflection will undoubtedly be a time of remembrance and celebration of Professor Donaldson’s life and his invaluable contributions, both to academia and to the Danish Royal Family. The Danish Royal House’s provision of an online condolence book ensures that his memory will be honoured by a wide audience, reflecting the global interest in Queen Mary and her remarkable family history.








