Margaretta (or Margaret) Alexandra Eagar (1863 — 1936), was an Irishwoman who served as a nanny to the four daughters of Emperor and Empress Nicholas II and Alexandra Feodorovna of Russia, the Grand Duchesses Olga; Tatiana; Maria; and Anastasia—known collectively as OTMA—from 1898 to 1904.
In 1906 she wrote a memoir entitled Six Years at the Russian Court about her time with the family.