Margaretta Alexandra Eagar, also known as Margaret Eagar, (August 12, 1863 - 1936), was a nurse for the four daughters of Tsar Nicholas II and Tsarina Alexandra. She wrote a 1906 memoir entitled Six Years at the Russian Court about her time in Russia.

Eagar was born in Limerick, Ireland, one of ten children born to a Protestant couple, Francis McGillycuddy Eagar and Frances Margaret Holden. She was trained as a medical nurse in Belfast and worked at one point as matron of an orphanage.

Eagar was appointed nurse to the daughters of Nicholas II in 1898 and remained with them until 1904. Grand Duchess Olga Alexandrovna of Russia, an aunt of the grand duchesses, later recalled Eagar's great love of politics. As a toddler, Grand Duchess Maria Nikolaevna of Russia once escaped from her bath and ran naked up and down the palace corridor while Eagar discussed the Dreyfus Affair with a friend. "Fortunately, I arrived just at that moment, picked her up and carried her back to Miss Eagar, who was still talking about Dreyfus," recalled Grand Duchess Olga Alexandrovna of Russia.

The four Grand Duchessess learned English from Miss Eagar and developed a distinct Irish accent in their pronunciation to such a degree that English tutor Charles Sydney Gibbes was brought in to "correct" this when the girls were older .

Eagar, who grew fond of all four grand duchesses, wrote in her book that she left the Russian Court for personal reasons. However, it was possible that she was dismissed due to the tense political situation surrounding the Russo-Japanese War. Great Britain largely sided with Japan.. OTMA was the affectionate group name used by the daughters of Tsar Nicholas II and Empress Alexandra: The Grand Duchesses Olga (November 15, 1895 - July 17, 1918); Tatiana (June 10, 1897 - July 17, 1918); Maria (June 26, 1899 - July 17, 1918); and Anastasia (June 18, 1901 - July 17, 1918). The girls would sign cards to their parents, relatives, and friends including Miss Eagar with the nickname. It was also used in their diaries.

Eagar received a pension from the Russian government for her time as a nurse. She exchanged letters with the grand duchesses describing her work as a governess for other families up until their murder in July 1918. She also later ran a boarding house that was unsuccessful and left her in debt. Family members stated that she remained haunted by the brutal murder of the girls she had grown so fond of until her own death in a nursing home in 1936.

*Eagar, Margaretta, Six Years at the Russian Court, 1906 *Massie, Robert K., Nicholas and Alexandra, 1967, Dell Publishing Co., ISBN 0440163587 *Zeepvat, Charlotte, From Cradle to Crown: British Nannies and Governesses at the World's Royal Courts, Sutton Publishing, ASIN B000GREBC0 *Alexander Palace Diaries