Frederica L. Miller (c. 1846-1934) was born in Ontario, Canada, and died in London, England. She married William N. Miller, a prominent lawyer, in 1864. Grief over the loss of their son turned her and her husband to Christian Science. The Millers became students of Pamelia J. Leonard, a student of Mary Baker Eddy's, and on December 29, 1894, they joined The First Church of Christ, Scientist, in Boston, Massachusetts. In November 1898, they completed Eddy's last Normal class. Miller was listed in the directory of The Christian Science Journal as a Christian Science practitioner in Toronto, Canada, in 1899. Her husband was appointed to the Board of Lectureship that year and, at Eddy's request, the Millers went to England, where they helped establish First Church of Christ, Scientist, London. Frederica Miller also established herself as a Christian Science teacher and practitioner. Both of the Millers were members of the General Association of Teachers of England. In 1905, they helped organize Third Church of Christ, Scientist, London, and five years later Frederica herself laid the cornerstone for the church. Because they lived too far from Boston to attend meetings, the Millers were, on the recommendation of Eddy, made Honorary Executive Members of The Mother Church.

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