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2 Dukes of Sieradz 3 Dukes of Leczyca |
Dukes of Sieradz-Leczyca
after 1305 parts of the united Kingdom of Poland initially as two vassal duhies, later incorporated as Leczyca Voivodship and Sieradz Voivodship.
Dukes of Sieradz
After 1305 part of the united Kingdom of Poland as a vassal duchy, later after 1339 incorporated by the king Casimir III the Great as the Sieradz Voivodship
Dukes of Leczyca