Quick answer
Sachin is a boy name meaning "existence, essence".
Meaning and history
Possibly from Sanskrit सत् ( sat ) meaning "existence, essence". A famous bearer is the retired Indian cricket player Sachin Tendulkar (1973-).
Notes and context
Usage: hindi, marathi, gujarati, telugu | Hindi: सचिन; Gujarati: સચિન; Telugu: సచిన్