SINO is the Greek name for China. In French, Chinese and German, China's pronunciation is similar to "Western". Their etymology should be cinah in Sanskrit, which comes from Qin Dynasty.
China also has a Greek adjective, Sinaean, which is a very positive word. Besides China, its root also means "the place where God lives", but it is definitely not related to Mount Sinai or Sinai Peninsula. Take English as an example (the situation in other western languages is similar). At present, there are recognized textual researches on ancient Indian Sanskrit cina and China-Greek Sinai/Serika-ancient Latin Sinai-late Latin Sinology, but why ancient Indians used cina is still inconclusive. At present, most scholars think that it refers to the Qin State in the Western Zhou Dynasty (1655, martini. Martin), but some scholars think it refers to Rongdi, an ancient Mongolian tribe, and sino is a transliteration of China, meaning wolf. Cina was first mentioned in ancient Indian classics in the Indian epics Mahabharata and Ramayana in 10 century BC (some scholars put it in the 5th century BC and 15 century BC).