Trevarno is a section of Livermore, Alameda County, California, built by a Cornish company, based at Trevarno, near Helston, manufacturing safety fuses. It is between First Street and the railroad and lies at an elevation of 535 feet (163 m). Trevarno is Cornish and means "farm/settlement of Varno". For more information, see Cornish surnames. Officials of Coast Manufacturing and Supply Company in Livermore named the area after George Bickford's home in Cornwall. The company made safety fuses invented by William Bickford, George's father.