What is the meaning of kemo sabe?

The phrase kemo sabe is often heard in the American radio and TV serial Lone Ranger. Its hero, a Texas Ranger, and his assistant, an American Indian called Tonto, keep calling each other Kemo Sabe. In an early episode, these characters run into each other for the first time. When they recognise each other as childhood friends, they utter the phrase kemo sabe. This phrase is not found in English or Spanish. Therefore, it is likely that the series writer coined the phrase based on some words in American dialects. According to many, the director of the radio version of Lone Ranger derived it from a Michigan dialect and suggested it to the writer. Apparently, in this dialect, the phrase means faithful friend or trusty scout. There are other theories related to kemo sabe as well.