Esther Snyder founder of In-N-Out Burger was born in nearby Sorento Illinois. She passed away in 2006 at the age of 86. The burger chain was founded in 1948 and currently has 358 locations. Not a franchise, the business is family owned. Esther's granddaughter Lynsi Snyder is the owner and heiress of the In-N-Out Burger company. There was a detailed interview with Esther where she talked about growing up in the Sorento, Panama, Donnellson area but it doesn't appear to be online anymore. She attended school in Bond County and continued her education at Greenville College.
Click to read her full obituary in the L.A. Times: