Anna Löwenstein (also spelt Lowenstein; born 1951) is a British Esperantist.

Under the name Anna Brennan she founded and was editor of the feminist magazine Sekso kaj Egaleco 1979–1988,[2] and she edited the 'easy language' section of Kontakto 1983–1986.

Her historical novel The Stone City[3] (La Ŝtona Urbo), was first published in English and Esperanto in 1999, and has since been translated into French (2010) and Hungarian (2014).

Her second novel Morto de artisto[4] (2008) was published in Esperanto.

[5] She is the widow of Renato Corsetti, a former president of the World Esperanto Association.