be well up on

be well up on something

to have a good knowledge of a subject I'm not very well up on Ancient Greek history.

Name	Pronounced	Usage
Kora	KO-rah	German
Olegario	-	Spanish
LechosŁAwa	le-khaw-SWAH-vah	Polish (Rare)
Nathalie	na-ta-LEE (French), NAH-tah-lee (German)	French, German
Ballantine	['bæləntain]
SebastiÃO	-	Portuguese