Login screen shows User called Other after High Sierra upgrade

During the process of the High Sierra upgrade on MacBook Air and updating iCloud, I was instructed to enter a new User password as it said a User and iCloud could no longer have the same password. After shutting down and logging back in, the login screen now shows three Users: me, with my name; Guest; and Other. I could login under me with my original password but cannot log into Other as I don't know the User Name for Other's account. Also, this "Other" User is not listed in Users and Groups in System Preferences So I can't remove it or find any info on this User. It seems to have something to do with when the iCloud process made me create a new password but that's just an assumption based on timing. Any solutions or explanations?