looking for Simeon Sanford..lived in Farmington area about 1847-1860

Son Marcus L Sanford, my grandfather worked in the area.he volunteered for the Civil War 11th Infantry. It shows that Simeon his dad married Matilda Holcomb in Knox county in 1847. the 1850 Census shows Marcus age 8 and his brother Chani age 2.
Any info appreciated