He is the husband of Nurie Keller.
Along with his siblings, he was brought up homeschooled under the teachings of Bill Gothard's Institute in Basic Life Principles. His parents were strict growing up, and he and his siblings had weekly scheduled fifteen minute meetings of one-on-one time with their parents.
On July 1, 2019, Nurie Rodrigues announced via a Facebook live video on her parents' account that she is courting Nathan Keller. This courtship was teased on her mother's blog on June 26, 2019. Later that day, her mother posted on her Instagram account that the two had been getting to know each other over the years when their families visited and that both she and Nathan were seeking their parents' guidance in the relationship.
In a later Instagram post, it was revealed that the courtship began "about 3 weeks" prior to the public announcement. Nathan sent her flowers with a note that read "Dear Nurie, thank you for your friendship for entering this next stage of courtship with me looking forward to what God will do in our future. Love Nathan". Shortly after, Nurie traveled to Georgia with her family to be a bridesmaid in a friend's wedding, which took place on June 26, 2019. Nathan came to Georgia to visit and presented her with a necklace that "made it even more official".
On November 9, 2019, Nathan proposed to Nurie Rodrigues on a bridge outside of the Stonewall Jackson Resort in Roanoke, West Virginia.
They were married on July 25, 2020.
On February 22, 2021, it was announced via a Facebook live video on Nurie's parents' account that Nathan and Nurie were expecting their first child. At the time of the announcement, Nurie was approximately 7 weeks along, and in her first trimester of pregnancy. The baby is due on October 12, 2021.