Question: Who is Frederick Iv, Duke Of Holstein-Gottorp's maternal grandmother?
Sentence (from "Princess Frederica Amalia of Denmark"): Princess Frederica Amalia of Denmark and Norway (11 April 1649 – 30 October 1704) was the second daughter of King Frederick III of Denmark and Sophie Amalie of Brunswick-Lüneburg, and Duchess of Holstein-Gottorp from 1667 to 1695 as the consort of Duke Christian Albert.
Relevant evidence: Yes