Question: Who is Mary Fitzroy, Duchess Of Richmond And Somerset's mother-in-law?
Sentence (from "Henry FitzRoy, Duke of Richmond and Somerset"): Henry FitzRoy, Duke of Richmond and Somerset (15 June 1519 – 23 July 1536), was the son of King Henry VIII of England and his mistress, Elizabeth Blount, and the only illegitimate offspring whom Henry VIII acknowledged.
Relevant evidence: Yes