What's the catch?

Sl. What is the drawback?; It sounds good, but are there any hidden problems? Sounds too good to be true. What's the catch? This looks like a good deal. What's the catch?

Common Names:

Name	Pronounced	Usage
Nicanor	-	Ancient Greek (Latinized)
Kalyana	-	Indian, Telugu
Abdur-Rahman	-	Arabic
Marnie	['ma:ni]
BjØRn	BYUURN	Norwegian, Danish
Doretta	-	English