rulon timpson jeffs (december 6, 1909 – september 8, 2002), known to followers as uncle rulon, was an american religious leader. he was the president of the fundamentalist church of jesus christ of latter-day saints (flds church) from 1986 until his death in 2002. he was the father of later flds church leader and convicted felon warren jeffs. he was born in salt lake city, utah.