Anna Carlovna, regent of Russia during the minority of her son Ivan, was the niece of the Empress Anna Ivanovna (q.v.), and in 1739 married Anton Ulrich, Duke of Brunswick-Wolfenbüttel. Her son Ivan, born in 1740, was nominated by the Empress Anna as her successor; and Anna Carlovna proclaimed herself regent, but showed no capacity. A conspiracy took place in 1741; the infant Ivan was murdered; and Anna and her husband were imprisoned at Cholmogory. Here she died in 1746; while Anton was confined till his death in 1776.
Anna Carlovna
Chambers's Encyclopaedia, Volume 1: A to Beaufort, p. 291
Source scan(s): p. 0310