a calling card

1. something that shows a person or animal has been in a place The beetles leave behind their calling cards: little white balls on the outside of the trees.

2. (mainly American) a quality or achievement that gives someone an advantage This performance acted as the calling card that landed Taylor her first major film role.

Common Names:

Name	Pronounced	Usage
Thurston	['θə:stən]
Niketa	-	Indian, Marathi, Hindi
Gianna	JAHN-nah (Italian), YAH-nah (Greek)	Italian, Greek
Marla	MAHR-lə	English
Boudewijn	BOW-də-vien, BOW-də-wien	Dutch
Dmitar	-	Croatian, Serbian