It was during this exile that Shinran cultivated a deeper understanding of his own beliefs based on Hōnen's Pure Land teachings. In 1210 he married Eshinni, the daughter of an Echigo aristocrat. Shinran and Eshinni had several children. His eldest son, Zenran, was alleged to have started a heretical sect of Pure Land Buddhism through claims that he received special teachings from his father. Zenran demanded control of local "monto" (lay follower groups), but after writing a stern letter of warning, Shinran disowned him in 1256, effectively ending Zenran's legitimacy.