Complex sentence: The U.S. Bank name first appeared as United States National Bank of Portland, established in Portland, Oregon, in 1891; it changed its name to the United States National Bank of Oregon in 1964.
Split into simpler sentences: The U.S. Bank name first appeared as United States National Bank of Portland, established in Portland, Oregon, in 1891. It changed its name to the United States National Bank of Oregon in 1964.