https://www.britannica.com/biography/A-P-Giannini
A.P. Giannini, in full Amadeo Peter Giannini, (born May 6, 1870, San Jose, California, U.S.—died June 3, 1949, San Mateo, California), American banker, founder of the California-based Bank of Italy—later the Bank of America—which, by the 1930s, was the world’s largest commercial bank.He was a major pioneer of branch banking. The son of Italian immigrants, Giannini left school at age 13 ...