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
Jerk	-	Swedish
Tancredi	-	Italian
Uzma	-	Arabic
Ondrej	-	Slovak
Pier	PYER (Italian), PEER (Dutch)	Italian, Dutch
Saxa	-	Ancient Germanic