know a hawk from a handsaw

To be able to tell two things apart. The phrase comes from Shakespeare's Hamlet. Of course I know which twin is which, I know a hawk from a handsaw, after all!

Common Names:

Name	Pronounced	Usage
Gerasim	-	Russian, Macedonian
Sigur&Eth;R	-	Ancient Scandinavian, Norse Mythology
Winthrop	WIN-thrəp	English
Svetomir	-	Serbian, Bulgarian
ZoltÁN	ZOL-tahn	Hungarian
Zurab	-	Georgian