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
Husayn	-	Arabic
Piloqutinnguaq	-	Native American, Greenlandic
Arianne	a-ree-AHN	French
Cosette	-	French, Literature
Acacia	ə-KAY-shə	English (Rare)
Leilani	lay-LAH-nee	Hawaiian