Question: Who is Anna Of Masovia, Duchess Of Racibórz's paternal grandfather?
Sentence (from "Zofia Odrowąż"): She was the daughter of castellan and voivode Stanisław Odrowąż and only daughter of Anna of Masovia, last Masovian duchess of the Piast dynasty, and became the widow of the castellan of Wojnicz and castellan of Sandomierz ..
Relevant evidence: No