John Evans was not the first territorial governor of Colorado. He was the second. William Gilpin was the first governor of Colorado Territory.

Robert Steele was the first and only governor of the unorganized Territory of Jefferson, which is what the first white settlers called Colorado, from 1859 to 1861, before President Buchanan signed the law creating Colorado Territory.

Also, to say there is a town named Chivington is to not understand Colorado. Take a look at "Chivington, Colo." There's nothing there but a few falling-down abandoned buildings, one house and a few mobile homes on a desolate stretch of Highway 96. It's not even an incorporated place. There's nothing to re-name, and no method of doing that.