On 12 August 1741, Louis married Caroline, daughter of Christian III, Duke of Zweibrücken.

They had three sons and five daughters, including: In 1775, Louis IX married Marie Adelaide of Cheirouze, countess of Lemberg.

Additionally Louis had an extramarital son with Ernestine Rosine Doll: Louis IX and his first wife became the most recent common ancestors of all current sovereigns of hereditary monarchies in Europe in 2022 after Charles III became King of the United Kingdom.

[citation needed] Dotted lines indicate marriage.

This article about a member of the German nobility is a stub.