The provided source material does not contain information regarding a city named Jager in Indonesia. Instead, the source identifies Jager as a Dutch occupational surname meaning "hunter."
Notable individuals with this surname include various figures in sports, music, and academia, such as five-time Olympic swimmer Tom Jager, trance music producer Finne Jager, and anthropologist Sheila Miyoshi Jager. Other notable people with the name include Dutch singer-songwriter Marike Jager and American medievalist Eric Jager.