You maybe right. Cmok or Tsmok is a mythical snake – dragon in Ukrainian and Belarusian folklores. Belarus has a basketball team “Tsmoki”. It’d be unusual to give the place a name that people settle after a snake or dragon in our culture. Such names are given to places that people don’t want to visit – certain swamps and areas in forests.
zhito is related to life – życie, zhivot, zhizn’. In Belarusian and Polish życie is life, while zhito is rye. Zhivot is stomach in eastern Slavic languages.