Renaud and Ida, countess of Boulogne might have been married in or before 1185. Moreover, German sources are split whether Ida's second husband was the aged Berthold IV, duke of Zähringen, or his young son and heir, Berthold V, duke of Zähringen.
See soc.genealogy.medieval:
https://groups.google.com/forum/?fromgroups#!topic/soc.genealogy.me...