 Sometimes the surname is "dos Reis" ("of the Kings").The Reis surname does not denote a single genealogical origin and there are many families bearing that surname.The Reis etymology is probably from the Latin "Rex" ("King"), and it is noticeable that it has relations with the German "Reich" ("Kingdom, Empire"), and the Dutch "Rijk" (also "Kingdom, Empire"), the Germanic names Rick, Rich, Richard, etc.