My name is Wiley Knowlton. I, too, am decended from Jesse and Hetty Knowlton.They had another son, Jesse Joseph.He was born in 1835 in Indiana.He is listed with them in the 1850 census records from St. Francis County, AR.
William R. Knowlton and his family moved to California from Texas between 1900 and 1910, and settled in Ventura County, CA.. I met two of his children, Isadora (Dora) and William F. in Lakeport, CA in 1959.I have some info on them if you are interested.
Also, his daughter, Eliza married an Arnett and moved to San Bernardino, CA about 1900.