She is the sister of Lauren Nakatsu. She is the half-sister of Jamie Roberts and Reed Roberts. She also has three step-siblings.
She is the wife of Jedidiah Duggar.
Katelyn Koryn Nakatsu was born on July 29, 1998, to Kory and Kim Nakatsu. She was the couple's first child and they went on to have one more child after her. Although Katelyn was her father's first child, she was her mother's third. Katelyn has two older half siblings through her mother. After her parents' divorce, Katelyn and her sister Lauren lived with their dad while her two older siblings continued to live with their mother. Both Katelyn and Lauren maintain relationships with their mother and older siblings. They were bridesmaids for their sister's wedding and also attended Kim's wedding in 2019, which gave them three additional step siblings.
At the time of Kory and Kim's marriage, the family was Christian, albeit not involved in the IBLP or ATI. Katelyn and her siblings went to public school and participated in a relatively "normal" American childhood.
Sometime in early 2005, Katelyn's parents divorced. In 2009, Katelyn's father remarried a woman named Kerry.
Katelyn went to public school through the 8th grade, until 2012. At that time her father made the decision to pull the girls from school and begin homeschooling them. He cited their desire to be "accepted by the world" as his reasoning.
Relationship with Jedidiah
Katey and Jedidiah Duggar supposedly met sometime in 2019. They chose to keep their relationship private and never made an official statement regarding their relationship until their wedding. Photos from their engagement and their wedding invitation were leaked to the public but neither of them confirmed anything.
On March 18, 2021, it was announced via the Nakatsu family blog that Jedidiah Duggar had proposed to their daughter Katelyn on February 14, 2021.
They were married on April 3, 2021, at the Barn at the Springs in Springdale, Arkansas. The wedding was live-streamed on YouTube.