Background and career
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.
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.
Avara is an investor. She inherited $3.1 billion upon the death of her father. 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.
Avara is married and lives in Houston. Avara's net worth is estimated to be $6.2 billion as of 2019.
Sources
Net-worth figure: Celebrity Net Worth (October 2026), in USD. Biography and career facts: the person's Wikipedia article and linked reporting. Snapshot date for all StarWorth figures: 28 October 2026.
