Sophie Harmansdochter
Sophie Harmansdochter, also known as Gele Fye (1505 – 3 March 1562), was a Dutch woman who became notorious for informing on religious minorities, resulting in many deaths.  She was eventually convicted of perjury, tortured and executed.

Harmansdochter was the daughter of Harman Hoen, an Anabaptist preacher from Zwolle.  She followed him on his preaching tours until his execution in 1534. After encountering difficulties in securing her inheritance after her father's death, Harmansdochter became an  informer for the mayor of Amsterdam. She married a burgher in Amsterdam in 1537. Harmansdochter's information led the arrest of Volckje Ward.  This led to the arrests and executions of numerous Anabaptists, then considered heretics, in Amsterdam, Leiden, Friesland and Antwerp between 1552 and 1553.

After the death of her husband, Harmansdochter experienced financial problems.  To make money, she attempted to implicate the  mayor as a heretic.  However, her scheme failed. She was arrested and convicted of perjury. After having her tongue cut out, she was executed by burning.

Harmansdochter has often been portrayed in Dutch literature.

References 
 Maarten Hell, Harmansdr., Sophie, in: Digitaal Vrouwenlexicon van Nederland. URL: http://resources.huygens.knaw.nl/vrouwenlexicon/lemmata/data/Harmansdr [13/01/2014]

1505 births
People from the Habsburg Netherlands
1562 deaths
16th-century executions
People executed by the Netherlands by burning
People of the Eighty Years' War
16th-century spies