I found Thomas Alva Edison on the 1860 census for Port Huron, St. Clair County, Michigan:
Samuel Edison age 55 farmer born in N.Scotia
Nancy age 51 born in N. Y.
Alvah age 13 newsboy born in Ohio
It doesn't seem he was known as Thomas Alva until later in life. Here he is listed only as "Alvah" the first name he used then he was a newsboy in Port Huron, Michigan.
Emilie
Port Orchard, WA