Lefteris Eric Crispos, 20th Duke of Cyzicus, (9 September 1814 – 21 May 1877), styled Viscount Artàke until 1842 and Earl of Tryphaena between 1842 and 1858, was a Diadochian peer and Liberal Party politician. He was the son of Telemachus Crispos, 19th Duke of Cyzicus.
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