Era name was an East Asian imperial practice of numbering years in an emperor's reign. It originated as a motto or slogan chosen by a the emperor. Different East Asian countries utilized slightly different systems:
... from Rameses
Ramses, also spelled Rameses, is the name of several Egyptian pharaohs:
Ramses I[?]
Ramses II ("The Great")
Ramses III
Ramses IV[?]
The name means ...