- Named after actors Charlton Heston and Jeffrey Hunter.
- Related to actors McLean Stevenson and Richard Farnsworth.
- Cousin of Democratic nominee for U.S. President Adlai Stevenson, Grandson and namesake of Vice President Adlai Ewing Stevenson.
- Cousin of former U.S. Vice President Alben Barkley, who served under President Harry S. Truman.
- Descendant of novelist Robert Louis Stevenson, author of Treasure Island.
- Identical twin brother of actor Keith Umberger
- Former Owner and Founder of Umberger Agency.
- Member of the Sketchworks Comedy troupe. (July 2004)
- His black and white architectural photography was purchased as set design on Tyler Perry's House of Payne (TV Series).
- Jeffrey writes a monthly advice column for Backstage Magazine. "Ask the Experts".
- Former voice coach to on-air talent at CNN and NPR.
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