Question: Who is Mervyn Tuchet, 2Nd Earl Of Castlehaven's paternal grandmother?
Sentence (from "Mervyn Tuchet, 2nd Earl of Castlehaven"): Sometime before 1612 (records of the marriage are lacking), Lord Audley married Elizabeth Barnham, a sister-in-law of the philosopher and scientist Francis Bacon, and with her he had six children.
Relevant evidence: No