The Dutch family found "waiting for the end of the world" at a remote farmhouse in Ruinerwold once had ties to the Moon cult, according to local media.
In an interview with De Telegraaf, a relative of the mysterious family-of-six said the father, Gerrit-Jan, was once part of the Unification Church, a powerful South Korean religious movement known for its mass weddings.
"Gerrit-Jan broke with the rest of the family a long time ago," the 32-year-old cousin said.
"About thirty years ago anyway. There was a lot of disagreement between my parents and my uncle, and between my uncle and the church association. At a certain moment he ran away angry. That was before I was born."
Gerrit-Jan's eldest son, 25-year-old Jan Zon van Dorsten, raised the alarm about his family's living conditions when he fled from the farmhouse on Sunday to a nearby pub.