"Diether VIII, Count of Katzenelnbogen (1340 - 19 February 1402) was a Count from the younger line of the House of Katzenelnbogen. He ruled in Upper Katzenelnbogen. In 1376 he took part in the coronation of King Wenceslaus IV of Bohemia, as King of Germany.
Diether was the son of Johann II of Katzenelnbogen (died 2 March 1357) and Elizabeth of Isenburg-Limburg. Diether was married on 8 June 1361 to Elisabeth of Nassau-Wiesbaden-Idstein (died 1 February 1389), a daughter of Adolph I of Nassau-Wiesbaden (1307-1370). They had the following children:
Johann IV, married 1385 Anna von Katzenelnbogen from the older line of Katzenelnbogen" - (en.wikipedia.org 02.06.2021)
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