Born in
Berlin, Dorothea Sibylle was the fourth and youngest daughter of her parents. After her father died in 1598, she grew up in her mother's estate,
Crossen (in present-day Poland). On 12 December 1610, Dorothea Sibylle married her maternal cousin, Duke
John Christian of Brieg. She was described as "kind, and religious". She also played a crucial role in her husband's conversion to
Calvinism in 1613. Dorothea Sibylle and John Christian had the following children: •
George III (4 September 1611 - 4 July 1664) • Joachim (20 December 1612 - 9 February 1613) • Henry (3 February 1614 - 4 February 1614) • Ernest (3 February 1614 - 4 February 1614) • Anna Elisabeth (23 March 1615 - 28 March 1616) •
Louis IV (19 April 1616 - 24 November 1663) • Rudolf (6 April 1617 - 8 February 1633) •
Christian (9 April 1618 - 28 February 1672) • August (18 March 1619 - 12 March 1620) • Sibylle Margareta (20 June 1620 - 26 June 1657) • Dorothea (16 August 1622 - 26 August 1622) • Agnes (16 August 1622 - 3 September 1622) • Sophia Magdalena (14 June 1624 - 28 April 1660) == References ==