[4] His paternal grandfather, David Rees-Jones, was a Presbyterian minister from Trefor, Wales who immigrated to the United States to serve as a pastor in Oklahoma and Texas.
[1] His paternal grandmother, Mary Edith Holmes, was a secretary for William Lever, 1st Viscount Leverhulme from Cheshire, England; she immigrated to the United States with her husband.
The company has been active in the Barnett Shale, a geological formation located in the Bend Arch–Fort Worth Basin.
[7][15] The Perot Museum of Nature and Science, created in 2006 by Rees-Jones' friend and business partner, fellow billionaire Ross Perot includes the Jan and Trevor Rees-Jones Exhibition Hall, the subject of a $25 million donation.
Rees-Jones has emerged as a large donor to the Republican Party and gave $1 million to American Crossroads in 2010.
[18] Rees-Jones and his wife Jan live in a 10,700 sq ft house in Dallas, Texas, valued by D Magazine at $13 million in 2011.
[16] For his 60th birthday party in August 2011, Dan Aykroyd, Jim Belushi and the Blues Brothers Band performed as the opening act, followed by The Eagles, who played a two-hour set.