1. auspicious cloudOnly applies to けいうん
2. Keiun era (704.5.10-708.1.11); Kyōun eraOnly applies to 慶雲
Wikipedia definition
3. Keiun, also known as Kyōun, was a Japanese era name following Taihō and preceding Wadō. The period spanned the years from May 704 through January 708. The reigning emperors were Mommu-tennō and Gemmei-tennō .
Read “Keiun” on English Wikipedia
Read “慶雲” on Japanese Wikipedia
Read “Keiun” on DBpedia
Other forms
景雲 【けいうん】卿雲 【けいうん】慶雲 【きょううん】


to talk about this word.