Overview
Princess Friederike Caroline Luise of Hesse-Darmstadt (20 August 1752 – 22 May 1782) was a member of the House of Hesse and by marriage a Duchess of Mecklenburg-Strelitz.
She is the most recent common matrilineal ancestress (directly through women only) of Queen Margrethe II of Denmark, King Willem-Alexander of the Netherlands, King Albert II of Belgium, King Harald V of Norway and Grand Duke Henri of Luxembourg.
Life
Friederike was born in Darmstadt, the eldest daughter of Prince George William of Hesse-Darmstadt, second son of Louis VIII, Landgrave of Hesse-Darmstadt, and Countess Maria Louise Albertine of Leiningen-Falkenburg-Dagsburg.
She married Duke Charles of Mecklenburg-Strelitz on 18 September 1768 in Darmstadt. They had ten children together. Two daughters became queens consort as Louise would marry Frederick William III of Prussia and Frederica would marry Ernest Augustus, King of Hanover.
From Wikipedia (CC BY-SA 4.0).