Anneke Esaiasdochter (alsoAnna Jansz,Anneken Jans orAnneke van Rotterdam; 1509–1539), was a DutchAnabaptist executed as aheretic and at the time regarded as aProtestantmartyr.
Anna Jansz was born inBrielle on the Dutch island of PuttenVoorne-Putten in 1509 or 1510. She was executed forheresy by drowning because of her connection toDavid Joris on 24 January 1539. She is the subject ofpoems, anovel and was regarded in thepropaganda as aProtestantmartyr. A description of her martyrdom is the basis of song number 18 of theAusbund. In the time of theMünster Rebellion between 1534 and 1536, she wrote theTrumpet Song (Ick hoorde de Basuyne blasen), a song influenced by the apocalyptic revolutionary spirit of the Dutch Anabaptist movement of the time, inspired by the writings ofBernhard Rothmann. The Trumpet Song was published for the first time inEen Geesteliick Liedt-Boecken byDavid Joris in 1539. She is the author of a "spiritual will", which was published in 1562.