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Dunham was born in Dallas, Texas on April 18, 1962. When he was three months old, he was adopted by real estate appraiser Howard Dunham, and his homemaker wife Joyce, who raised him in a devoutly Presbyterian household in an affluent Dallas neighborhood, as an only child. He began ventriloquism in 1970 at age eight, when his parents gave him a Mortimer Snerd dummy for Christmas, and an accompanying how-to album. The next day he checked out a how-to book on ventriloquism from the library, and explained in 2011 that he still had it, remarking that he was "a thief in the third grade".

Dunham met his first wife, Paige Brown, at the Comedy Corner in West Palm Beach, Florida. They began dating in December 1992. In May 1994, Dunham married Brown and adopted her one-and-a-half-year-old daughter, Bree. Their daughters Ashlyn and Kenna were born in 1995 and 1997, respectively. Dunham's time away while performing proved a strain on the marriage, and in November 2008, he filed for divorce. By mid-2009, Dunham was in a relationship with fellow Texan Audrey Murdick, a certified nutritionist, personal trainer, and competition bodybuilder, and on December 25, 2011 they became engaged. On October 12, 2012, the couple married. On May 14, 2015, Dunham announced, via Facebook, that he and Audrey were expecting twin boys. In October, she gave birth to James Jeffrey and Jack Steven.  In addition to building the dummies he uses in his act, Dunham also restores antique ones as a hobby, such as The Umpire, a 6-foot-tall (1.8 m) mechanized dummy built in 1941 to work the plate at a girls' softball game, which went unused and packed away for 50 years before Dunham acquired it in early 2008.  Dunham has harbored a love of helicopters since childhood and is fond of building and flying his own kit helicopters from Rotorway helicopter kits. At the time he finished writing his autobiography in June 2010, he was beginning to build his fourth kit. He is an aficionado of muscle cars and Apple, Inc. products.  According to the July 16, 2012, TV documentary, The Batmobile, Dunham owns a replica of the Batmobile that was used in the Tim Burton film Batman. CANNOTANSWER
<bot>: Jeff Dunham