Question: Who is younger, Robert Gonçalves Santos or Donough O'Brien, 16th Baron Inchiquin?
Sentence (from "Donough O'Brien, 16th Baron Inchiquin"): 5 January 1897 – 19 October 1968) was the holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility.
Relevant evidence: Yes