Elfreda, Elfrida, Alfrida, Elfrieda, Elfriede, Elftrude, Elftraut is a female given name, derived from Ælfþryð (Aelfthryth) meaning "elf-strength". The name fell out of fashion in the Middle Ages and was revived in the 19th century in both England and Germany. Although some of its modern forms like Alfieda can be mistaken for feminine versions of Alfred, that derives from Ælfræd ('elf-counsel' or 'wise-elf').
medieval
Saint Ælfthryth of Crowland (died c. 795)
Ælfthryth, wife of King Coenwulf of Mercia (fl. 810s)
Ælfthryth, Countess of Flanders, daughter of King Alfred the Great (d. 929)
Elftrude, daughter of Adele of Vermandois and Arnulf I, Count of Flanders (10th century)
Ælfthryth, wife of Edgar, king of England, mother of Ethelred the Unready (d. 1000)
modern
Elfrida Andrée (1841–1929), Swedish organist, composer and conductor
Elfrida De Renne Barrow (1884–1970), American author and poet
Elfriede Elfi von Dassanowsky (1924–2007), Austrian-born singer, pianist and film producer
Elfriede Elfi Eder (born 1970), Austrian former alpine skier
Elfriede Geiringer (1905–1998), Austrian Holocaust survivor, second wife of Otto Frank, father of Anne Frank
Elfriede Gerstl (1932–2009), Austrian author and Holocaust survivor
Elfriede Elfi Graf (born 1964), Austrian singer
Elfriede Jelinek (born 1946), Austrian playwright, 2004 Nobel laureate in Literature
Elfrida Pigou (1911–1960), Canadian mountaineer
Elfrida Rathbone (1871–1940), English educationist
Elfriede Rinkel (born 1922), guard at the Ravensbrück concentration camp
Elfriede Trötschel (1913–1958), German soprano
Elfrida Vipont, pen name of Elfrida Vipont Foulds (1902–1992), British author of children's books
