Question: Who is Duchess Altburg Of Oldenburg's maternal grandmother?
Sentence (from "Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin"): Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin (10 August 1869 – 3 September 1955) was a daughter of Frederick Francis II, Grand Duke of Mecklenburg by his third wife Princess Marie of Schwarzburg-Rudolstadt.
Relevant evidence: Yes