Question: Who is the father-in-law of Countess Louise Juliana Of Nassau?
Sentence (from "Countess Louise Juliana of Nassau"): Louise Juliana of Orange-Nassau (31 March 1576 in Delft – 15 March 1644 in Königsberg) was a countess of the Palatinate by marriage to Frederick IV, Elector Palatine, and regent during the minority of her son from 1610 until 1611.
Relevant evidence: Yes