Agatha Catharina Cornelia "Agaath" Witteman Croiset (5 April 1942 – 5 June 2026) was a Dutch politician and theatre director. A member of the Labour Party, she served in the Senate from 2003 to 2007.

In 1980, Witteman co-founded the Theater 80 together with actress Femke Boersma and , among others, which became Theater Persona in 1984.

Witteman died in Breukelen on 5 June 2026, at the age of 84.

References