 His brother Henry II decided in 1367, after his own son Otto had died in the spring, to adopt Louis's son Herman II as his co-ruler and heir.On 15 October 1340, Louis married Elisabeth (or Elise), a daughter of Count Simon II of Sponheim-Kreuznach.She was the widow of the Swabian Count Rudolph I of Hohenberg, who had died in 1336.