Thomas Arundell 1st Baron Arundell of Wardour (ca. 1560 – 7 November 1639) was the eldest son of Sir Matthew Arundell of Wardour Castle in Wiltshire (ca. 1532/34–24 December 1598) and Margaret Willoughby the daughter of Sir Henry Willoughby of Wollaton Nottinghamshire. He distinguished himself in battle against the Ottoman Turks in the service of the Emperor Rudolf II and was created a Count of the Holy Roman Empire.
