Johan II of East Frisia

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Johan II of East Frisia
Born	29 September 1538 Aurich
Died	29 September 1591(1591-09-29) (aged 53) Stickhausen Castle
House	Cirksena
Father	Enno II of East Frisia
Mother	Anna of Oldenburg

Count Johan II of East Frisia (29 September 1538, Aurich – 29 September 1591, Stickhausen Castle) was a member of the House of Cirksena and from 1561 until his death in 1591 co-regent of the county of East Frisia. He ruled jointly with his brother Edzard II.

In 1558 the primogeniture of John's mother, the Countess Anna was abolished, presumably to stem the impact of the house Vasa in the county, which was based on the marriage of her eldest son Edzard with Catherine Vasa of Sweden, the eldest daughter of King Gustav I of Sweden. This meant that she abolished Edzard right to be the sole ruler of the county. This led to a de facto division of East Frisia, because Johan, like his mother, was a Calvinist, whereas Edzard II was a Lutheran.