Robert de Châtillon, évêque de Langres et de Laon - Hmm...

So there's two-three of these guys, and which one is who?

Looks mostly like this one: https://fmg.ac/Projects/MedLands/chamchalons.htm#RobertChatillonLao...

Birth date is probably wrong (miscalculated?), should be somewhere in the later 1160s.

There were several Roberts who were bishops of Langres:
1. Robert de Bourgogne (from 1085 to 1111), a younger son of Duke Henri of Burgundy https://fmg.ac/Projects/MedLands/Lyon.htm#RobertLangresdied1111

2. Robert (no familial association), briefly in 1115 (Wikipedia never heard of him)

3. Robert (no familial association), from c. 1203 to 1208 - Wikipedia misidentifies him with Robert II de Chatillon, who was bishop od Laon, *not* Langres.

"The distance between Laon and Langres is approximately 141 miles, or 227 kilometers." https://www.wanderu.com/en-us/train/fr/laon/fr/langres/

While Guy de Châtillon-sur-Marne, II may have had a first wife (it would have beenodd if he didn't), she wasn't Alix de Montmorency *That* Alix married SIMON [V] Seigneur de Montfort. https://fmg.ac/Projects/MedLands/PARIS%20REGION%20NOBILITY.htm#Alix...