Question: Who is the paternal grandmother of Gertrude Of Poland?
Sentence (from "Gertrude of Poland"): Gertrude-Olisava (c. 1025 – 4 January 1108), princess of Poland, was the daughter of King Mieszko II of Poland and Queen Richeza of Lotharingia, and the great-granddaughter of German Emperor Otto II.
Relevant evidence: Yes