Disambiguation evidence for Masovian Piasts via surface form

"Piast dukes of Masovia"

Triples (1)

Triples where some other subject referred to this entity as "Piast dukes of Masovia".

Czersk stronghold → ownedBy →
"Piast dukes of Masovia"
↳ resolves to Masovian Piasts
ⓘ