Somewhere over the Rainbow, Texas
"... Among the first settlers was William Porter, who established a school in the late 1860s; for several decades the area was referred to as the Porter school district. By the 1890s a community had developed, and the residents requested a post office. When the townspeople gathered to name the community a thunderstorm broke out, followed by a rainbow. The residents, struck by the beauty of the rainbow, named their town after it...." From The Handbook of Texas