Is there a problem with writing out non Jewish names that are derived from foreign traditions or which contain elements of avoda zarah. For instance Christopher. And what about storing these on electronic systems?
It is permitted to write these names manually or digitally. This is because you are not writing the name of the avoda zara, but the name of a specific person whose name happens to partially contain the name of an avoda zara. The poskim do discuss saying the name of certain cities that are named after avoda zara etc. or saying x-mas, which means the avoda zara’s mass. However you instance is better than that.