Career
Ludwig Otto married Albertine Johannette, Princess of Nassau-Hadamar (5 July 1679 – 11 June 1716) on 20 July 1700. She was a great-granddaughter of John VI, Count of Nassau-Dillenburg, brother of William the Silent. The couple had three children:
Dorothea Franziska Agnes (21 January 1702 – 25 January 1751).
Married Nicholas Leopold, count of Salm-Hoogstraten and they became the Prince and Princess of Salm-Salm, had eighteen children and have many descendants including Princess Rosemary of Salm-Salm and Princess Isabella of Croÿ.
Elisabeth Alexandrine Felicite Charlotte Gotfriede (21 July 1704 – 27 December 1739). Married Claude Lamoral, 6th Prince of Ligne and had issue.
Ludwig Otto died in Anholt castle in 1738. With his death the male line of descendants (altfürstliche Linie Salm) came to an end, since Ludwig Otto had no son as heir.