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
Bernardino	ber-nahr-DEE-no (Italian, Spanish)	Italian, Spanish, Portuguese
Otokar	-	Czech
Myrtle	['mə:tl]
Wiegand	-	German (Rare)
Iuliu	-	Romanian
Solvej	-	Danish