Background
Born in Fürstenau, he was the fourth child and second (but eldest surviving) son of Philipp Charles, Count of Erbach-Fürstenau and his second wife Anna Sophie, a daughter of Kaspar, Baron of Spesshardt in Unsleben and Mupparg.
Born in Fürstenau, he was the fourth child and second (but eldest surviving) son of Philipp Charles, Count of Erbach-Fürstenau and his second wife Anna Sophie, a daughter of Kaspar, Baron of Spesshardt in Unsleben and Mupparg.
On 4 February 1784 Louis II married morganatically with Christine Sophie Küchler, his long-time mistress, who assumed the title of Frau von Treuberg. Eginhard (16 July 1780 – 25 October 1827), a Bavarian colonel. Married and had issue (line extinct in 1965).
Louis II died in Heidelberg aged 65 and was buried in the Providenzkirche.