Mary Colvin
Brigadier Dame Mary Katherine Rosamund Colvin (25 October 1907 – 23 September 1988) was a director of the British Army Women's Royal Army Corps (WRAC) and president of the British Horse Society.
Katie Ford (CEO)
Mary Katherine" Katie" Ford( born 1955) is the former CEO of the modeling agency Ford Models, Inc. from 1995 until 2007.
Mary Katherine Herbert
Mary Katherine Herbert( also known as Maureen)( 1 October 1903, Ireland – 23 January 1983) was a member of the Special Operations Executive( SOE) during World War II and worked as a courier for the French Section.
William Pitcairn Campbell
Lieutenant General Sir William Pitcairn Campbell( or Pitcairn- Campbell),( 20 June 1856 – 22 September 1933) was a British Army General during World War I.
Lady Mary Clive
Lady Mary Katherine Clive ("née" Pakenham 23 August 1907 – 19 March 2010) was a British writer and historian, known for her memoirs of her family and her time as a debutante.
Ed Westwick
Edward Jack Peter Westwick( born 27 June 1987) is an English actor and musician, best known for his role as Chuck Bass on The CW's teen television drama series" Gossip Girl" alongside co-stars Blake Lively and Leighton Meester.
He made his feature film debut in" Children of Men"( 2006) and has since appeared in the films" Breaking and Entering"( 2006)," Son of Rambow"( 2007)," S. Darko"( 2009)," Chalet Girl"( 2011)," J. Edgar"( 2011)," Romeo and Juliet"( 2013)," Bone in the Throat"( 2015)," Freaks of Nature"( 2015), and" Billionaire Ransom"( 2016).
He currently plays Vincent Swan in the BBC Two television comedy series" White Gold"( 2017).
Mary Batcher
Mary Katherine Batcher is an American statistician who chairs the National Institute of Statistical Sciences.
Mary K. Bryan
Mary Katherine Bryan( 1877 – 1962) was an American botanist and phytopathologist.
Much of her research involved leaf spots and cankers caused by bacteria.
Mary Katherine Campbell
Mary Katherine Campbell( December 18, 1905 – June 7, 1990) was the only person to win the Miss America pageant twice and the second woman in history to win the title.
Tryphosa Jane Wallis
Tryphosa Jane Wallis or Tryphosa Jane Campbell or Miss Wallis from Bath (11 January 1774 – 29 December 1848) was a British actress.

Question: Who is older, Mary Katherine Campbell or Ed Westwick?
Answer: Mary Katherine Campbell