Dannine Avara (née Duncan, born 1964), is a billionaire heir to the Duncan family, through Enterprise Products, an energy pipeline giant which remains under family control.

Early life Dannine Avara was born in 1964 to Barbara and Dan Duncan. Barbara was Dan's first wife. Her father, Dan Duncan, was the co-founder of Enterprise Products.Houston Business Journal: "Dan Duncan dies at 77" by Casey Wooten March 29, 2010

Career Avara is an investor. She inherited $3.1 billion upon the death of her father.Houston Business Journal: "Duncan heirs added to Forbes richest 400 list" by Casey Wooten September 22, 2010 Due to a temporary repeal of the estate tax law for the year 2010, Duncan became, along with her siblings, the first American billionaires to pay no estate tax since its enactment.New York Times: "Legacy for One Billionaire: Death, but No Taxes" By DAVID KOCIENIEWSKI June 8, 2010

Personal life Avara is married and lives in Houston. Avara's net worth is estimated to be $6.2 billion as of 2019.

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