Is logon and demi

It seems like there might be a typo or missing context in your question. If you're asking whether "logon" and "demi" are related, they typically refer to different concepts: "logon" is often associated with logging into a system or application, while "demi" can refer to a prefix meaning "half" in French or other contexts like "demigod." Could you please clarify your question for more accurate assistance?