- da.wikipedia.org Henrietta Clark DonaldsonHenrietta Clark Donaldson (født Horne) (født 2. maj 1942 i Skotland, død 20. november 1997) var mor til Dronning Mary.
- royal.myorigins.org p/Henrietta_nee_Clark_Horne/Jane Alison Stephens née Donaldson Patricia Anne Bailey née Donaldson John Stuart Donaldson Mary, Queen consort of Denmark née Donaldson.
- gala.de royals/skandinavier/themen/henrietta-…Henrietta Clark Donaldson. Henrietta Clark Donaldson. Prinzessin Mary.
- myheritage.com names/henrietta_donaldsonHenrietta Clark Donaldson (born Horne) was born on month day 1942, in birth place, to Archibald Horne and Elizabeth Catherine Gibson Horne (born Melrose).
- dailymail.co.uk news/article-12950963/Queen-…The future Crown Princess Mary of Denmark is pictured in the arms of her mother Henrietta Clark Donaldson in 1972 in Hobart, Tasmania.
- archive.md lrBtOThe Queen's mother was Mrs. Henrietta Clark Donaldson, born 12 May 1942. ... Henrietta Clark Donaldson died 20 November 1997.
- gettotext.com mary-of-denmark-the-tragic-loss-of-…“By all accounts, Mary’s childhood was happy with her parents: his father John Dalgleish Donaldson and his mother Henrietta Clark Donaldson...
- geni.com people/Henrietta-Donaldson/…Henrietta Donaldson (born Clark) in MyHeritage family trees (House of Romanov). ... Henrietta Clark Donaldson in Famous People Throughout History.
- scotsman.com heritage-and-retro/heritage/family-…She is the youngest daughter of mathematician John Dalgleish Donaldson and Henrietta Clark Donaldson (née Horne), who grew up in Port Seton in East Lothian...
- wikitree.com wiki/Horne-758On 31 August 1963, Henrietta Clark Horne married John Dalgleish Donaldson, at Port Seton. They emigrated to Tasmania, Australia, in November of that year.