Question: Who is the paternal grandmother of Casimir I The Restorer?
Sentence (from "Casimir I the Restorer"): Casimir I the Restorer (b. Kraków, 25 July 1016 – d. Poznań, 28 November 1058), was Duke of Poland of the Piast dynasty and the "de jure" monarch of the entire country from 1034 until his death.
Relevant evidence: No