Disambiguation evidence for Isabella of Castile, Duchess of Brittany via surface form

"Isabella of Castile, Duchess of Brittany"

Triples (1)

Triples where some other subject referred to this entity as "Isabella of Castile, Duchess of Brittany".

John III, Duke of Brittany → spouse →
"Isabella of Castile, Duchess of Brittany"
ⓘ