Jessa (Duggar) Seewald and Ben Seewald's son turns 1 week old today

By Aurelie Corinthios
Updated November 12, 2015 10:50 AM

Jessa Duggar Seewald is opening up about her firstborn – and why she was rushed to the ER following a dramatic two-day labor. Subscribe now for this Duggar baby exclusive, only in PEOPLE!

After baby name comes nickname, and Jessa (Duggar) Seewald and her husband Ben Seewald have already chosen one for baby Spurgeon.

Their 1-week-old son, whose full name Spurgeon Elliot Seewald was revealed Wednesday, will be called Quincy.

Jessa, 23, confirmed the surprising nickname on Facebook after a fan commented on her recent post about the baby’s name, asking whether their son would go by Spurgeon or Elliot.

“Both, but everybody still calls him Quincy!” Jessa replied with a smiley-face emoji.

In the big name-reveal video released by TLC on Wednesday, Jessa also mentioned that the couple had long referred to their first child as Quincy.

“His nickname has been Quincy since we first found out we were pregnant,” Jessa said with a smile in the clip.

Why? During her pregnancy, the new mom explained the nickname’s origin on her family friends’ blog.

“When we first found out that we were expecting a baby, Ben and I were talking about a letter theme for our kids and Ben suggested, ‘Why don’t we go with the letter Q’?’ lol!” she wrote. “Of course that was a joke, but from that point, Ben started calling our little one ‘Quincy,’ and the nickname just sorta stuck.”

The newborn is named after Charles Spurgeon, a British preacher who lived from 1834-1892. His middle name, Elliot, was given to him in honor of late missionaries Jim and Elisabeth Elliot, who worked in South America.

Jessa and Ben, 20, welcomed Spurgeon Nov. 5. The baby weighed 9 lbs. 11 oz. and measured 21 inches long at birth.

The couple opened up about their firstborn and how they went about choosing a name for him in this week’s PEOPLE cover story.

“We want to give him a strong name, with a lot of meaning,” Jessa explained, adding that she favored names “of heroes from the Christian faith.”

“He is going to have this name for the rest of his life,” Ben said.

For much more on Jessa and Ben Seewald – including exclusive photos of their son, a glimpse into their lives as new parents and their plans for baby number two – pick up this week’s issue of PEOPLE, on newsstands Friday