Marissa Estep, 22, who went to the national bee twice, made it in 2004. Sam Estep, 17, a three-time contestant, advanced in 2010. Last year, George Estep, 15, got through. And now, Edwin Estep is preparing for his first appearance.
At their rural home on 22 acres near Winchester, Virginia, the Esteps have worked spelling into their homeschooling routine.
"Webster's Third is second only to the Bible in our house," says the children's mother, Kim, laughing.
Dynasties are part of the bee's lore, with streams of siblings - three, four, five, even six - competing for etymologic glory on ESPN, The Washington Post reported.
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A total of 36 competitors have parents, grandparents or siblings who participated in the national bee.
In this year's bee, which begins on Tuesday in Maryland, three of the 285 contestants have older siblings who won the whole thing: Vanya Shivashankar, a 13-year-old from Kansas, and Jairam Hathwar, 12, and Srinath Mahankali, 11, both from New York.
Jairam comes from a spelling family: His brother Sriram competed in the Scripps National Spelling Bee a total of five times and became co-champion in 2014.
This is Srinath's first Bee, but his older brother Arvind competed four times beginning in 2009, and was the national champion in 2013, according to facts released by the orgainisers of the competition, now in its 88th year.
"People stop us at the grocery store," Laura Estep says. "They're like, 'Hey, there's the spelling bee family!'?"
The Estep family's foray into spelling was not fueled by dreams of having their children one day stand on stage and correctly spell tough words. It was fueled by panic.
When their eldest child, Craig, was in the third grade, he did not fare well on a standardised spelling test. That set off alarms. Spelling practice with a programme called "Spelling Power" soon followed.
"Once you make it once, everyone expects you to do it again," he says.
This year the winner will get a cash prize of some USD 35,000.