I've written previously about the phenomenon of communities changing their names. For example, I wrote on this blog a few years ago about Dadeville, Missouri, which was originally known as Melville. This phenomenon of name changing was not unusual in the Ozarks (and probably elsewhere as well). Often the name change was prompted by the U.S. Post Office. That is, a community often went by a certain name during its very early days, but when it approached the Postal Service about the possibility of obtaining a post office, the community was sometimes informed that a town by its name already existed elsewhere in the state. Sometimes the two names didn't even have to be exactly alike, if they were close enough to cause confusion. That's what happened in the case of Melville/Dadeville. Postal workers supposedly said that they kept getting Melville mixed up with another community in Missouri named Millville, and Melville agreed to change its name. There were several other reasons why a community might change its name. Sometimes name changes had political overtones, especially related to the Civil War. Sometimes names of places were changed to honor a prominent local citizen. Or, as in the case of Rosati, located in eastern Phelps County, names were sometimes changed because of a large influx of immigrants.
Rosati was originally settled during the 1840s or 1850s and called Knobview, supposedly because it was located on an eminence along the old Springfield to St. Louis road (which is roughly I-44 today) and, when travelers reached the spot, they could see three knobs or hills in the distance to the southwest. In 1898, a large group of Italian immigrants settled at Knobview and shortly afterwards starting several vineyards in the area. (Rosati is still known today for its grape growing and its wine industry.) In 1931, residents of Knobview petitioned the Post Office to change the name of their community to Rosati, after Bishop Joseph Rosati, the first bishop of St. Louis and the first American bishop of Italian descent. The request was granted.