on one's honor

Entrusted to behave honorably and honestly without supervision. For example, The students were on their honor not to consult notes during the exam. Originally alluding to a solemn oath, this idiom dates from the mid-1400s.

Common Names:

Name	Pronounced	Usage
Marcelina	mahr-tse-LEE-nah	Polish
Cyrielle	-	French
ArnbjÖRg	-	Ancient Scandinavian, Icelandic
Xande	-	Portuguese
Yoshi	yo-shee	Japanese
Elah	-	Hebrew, Biblical, Biblical Hebrew