According to the 1860 Monroeville Township, Monroeville post office, Colusa Co., CA, US Federal Census, G.A. lived with his parents, Eugene Alvarez, 42, (who was a farmer) and Julia Alvarez, 33. He was 11 years old making his birth year about 1849. He was born in Missouri. Also in the home was a 10 year old girl, Sally who was born in California and is listed as a Native American Indian. Also in the home is Nelly Hardin a 1 year old Native American Indian girl.
Keith Lingenfelter states in Tehama County Pioneers that Griffin A. Alvarez was murdered in Kanawha, Glenn Co., California on 6 August 1877. Note that Glenn County was not formed from Colusa Co., CA until 1891. Kanawah was a former community located about four miles west of Willows, present day Glenn Co., California.
Note: He was shot dead by George Hilton in a saloon at Kanawha. From "Colusa County History": "The trouble grew out of a game of poker the two men were playing just before the shooting." Source: David James - relative