Gerald FitzGerald, Thomas Butler, and Gilbert Talbot all held the title of "Earl" as peers of Ireland; this wasn't unusual, as multiple people, including Henry Frederick Stuart and Ludovic Stewart, held the title of "Marquess" in England at the same time.
His Grace
The Duke of Lennox Henry Frederick, Prince of Wales KG (19 February 1594  6 November 1612) was the eldest son and heir apparent of James VI and I, King of England and Scotland, and his wife Anne of Denmark. 
