theobald i was married three times; in 1176 he married laurette of loon (de looz), daughter of louis i, count of loon and agnes of metz; they had one daughter. secondly, he married ermensinde de bar-sur-seine, daughter of guy ii of brienne and petronille de chacenay, circa 1189; they had one son and two daughters. theobald and ermensinde divorced circa 1195. he then, married ermensinde of luxembourg, daughter of henry coecus "the blind" of luxembourg and agnes of gueldres, in 1197; they had two sons and three daughters.