Chrissie is the daughter of Frank Williams, the father of Chief Executive Officer Mark Williams, and former staff nurse Tricia Williams.
A child protection specialist, Mark Williams-Thomas, who believes that Joana's and Madeleine's disappearances are related, said that the disappearance of two children unknown to each other, within a period of four years in a seven-mile radius, would be a huge coincidence, especially considering that Portugal is a small country with few abductions.
J. Mark G. Williams, academic and author specialising in depression and suicide
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Mark T. Williams (born 1963), educator, author and risk management expert
In 2013, Williams-Thomas won two Royal Television Society awards and the London Press Awards Scoop of the Year for the film.
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He has an MA in criminology from Birmingham City University, where he is also studying for a PhD in the same subject.
Mark Twain | John Williams | Mark | Robin Williams | Robbie Williams | Tennessee Williams | Williams College | Ralph Vaughan Williams | Mark Wahlberg | Ted Williams | Vanessa L. Williams | Mark Knopfler | Mark Zuckerberg | Mark Rothko | William Carlos Williams | Mark Antony | Mark the Evangelist | Hank Williams, Jr. | Hank Williams | Gospel of Mark | Don Williams | Williams | Mark Ronson | Shirley Williams | Mark Spitz | Lucinda Williams | Andy Williams | Victoria Williams | Serena Williams | Mark Foley |
Bargoed is regularly namechecked during televised snooker tournaments as Mark Williams, Embassy World Snooker Champion in 2000 and 2003, practises his sport at the town's Emporium Snooker Hall.
Some of the Clontarf students who have gone on to play football at a professional level include Mark Williams, Dion Woods, Andrew Krakouer, Michael Johnson, Lewis Jetta, Chris Yarran and Patrick Ryder.
Two recent occasions on which he officiated during key matches were the World Championship finals between Stephen Hendry and Mark Williams in 1999 and the match between Peter Ebdon and Ronnie O'Sullivan in 2005 (the so-called "slow-play" match).
They recorded with the record producer Mark Williams (Biffy Clyro, Bloc Party, Fightstar, Nine Black Alps, Million Dead, Ghymp) at the Battery Studios in London and they toured with Get Cape Wear Cape Fly, Hot Club De Paris and The Rumble Strips, as well as also playing with bands including The Futureheads, Melt Banana, The Young Knives, Make Believe and Foals.