Countess Louise Juliane of Erbach (1603 at Fürstenau Castle near Michelstadt – 28 September 1670 in Friedewald) was a German noble and regent. She was Countess of Sayn-Wittgenstein-Sayn by marriage to Ernest of Sayn-Wittgenstein-Sayn.
She acted as regent of Sayn-Wittgenstein-Sayn between 1632 and 1652; initially during the absence of her spouse, in 1632-1636 during the minority of her son, and in 1636-1652 as interim regent during the interregnum following the death of her son and the ensuing succession dispute.
She is remembered as the title character of the novel Die Gräfin von Sayn ("The Countess of Sayn") by Karl Ramseger-Mühle.
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Biography
Countess Louise Juliane of Erbach was born in 1603 as the daughter of Count George III and his wife, Maria of Barby-Mühlingen. She married Count Ernest of Sayn-Wittgenstein-Sayn in January 1624, shortly after he had inherited the County. He was the son of Count William III of Sayn-Wittgenstein-Sayn, who had reunited the two lines of Sayn by marrying Anna Elisabeth of Sayn. William III had three more sons from his second marriage to Anna-Ottilie of Nassau-Weilburg, who would dispute the inheritance after Juliane's son Louis died in 1636.