Eric XIV of Sweden
When Catherine and John were imprisoned in Gripsholm Castle in Sweden in 1563, Catherine was not able to keep her entire household of Poles, Italians and Germans, but Dorothea Ostrelska, as well as another court dwarf, belonged to those she acquired permission from Eric XIV of Sweden to keep. During the four years long captivity, Dorothea is noted to be by Catherine's side when she walked the gardens, when she was given permission to leave the Castle and visit a spring, and she gave birth in prison.