Thaddea Valenza de Vouthon

Some confusion surrounds two women with similar names, "Thadéa di Visconti" or "Thadée" as well as one "spouse" named Marguerite Coln, who married a different "Jehan de Vouthon" (different birth dates). There may be a other homonyms. What seems MOST LIKELY, in view of all data seen:

1. Thadea Valentina di Visconti (i.e. the Elder) married Jean de Vouthon, the ELDER. Occasionally, she is deemed to be the wife of Jean de Vouthon, the younger, although this does not seem feasible (see point N°2 here).
2. Thaddea de Visconti, the Younger, niece of the above Thadea Valentina, N°1, born in 1351 in Milan, married to a Bavarian prince, and mother of a future Queen Isabelle, wife of Charles VI of France. This Bavarian princess passed away in Bavaria at around 30 yrs of age, in 1381. See Wikipédia [https://en.wikipedia.org/wiki/Taddea_Visconti]