Jamison Square
From Portland's Parks & Recreation web page:
Located between NW Johnson and Kearney, Jamison Square was the first to be developed. It is named in honor of William Jamison, whose presence was pivotal in the development of the River District. He was an exceptional person in his ability to influence and connect with a wide variety of people. His personal magnetism, in addition to the size and scope of his art gallery, drew many people into the Pearl District.