Jonas and Petronėlė Zaronai were poor farmers living near Eržvilkas. During the Holocaust, they built a bunker that became a long-term hiding place for persecuted Jews. At least six people survived in this shelter. A four-metre tunnel led from the hiding place to a summerhouse, where Petronėlė prepared a place for the hidden Jews to wash and clean themselves. Petronėlė and Jonas took turns going to the shop in Eržvilkas to get food.