keep under one's hat

Preserve the secrecy of something, as in I'll tell you about it if you promise to keep it under your hat. This usage alludes to hiding a secret in one's head, covered by a hat. [Late 1800s]

Common Names:

Name	Pronounced	Usage
Shreya	-	Indian, Hindi, Marathi, Bengali, Gujarati
Kyriakos	-	Greek, Ancient Greek
Suljo	-	Bosnian
Udi	-	Hebrew
Rodina	-	Scottish
Carmichael	[ka:'maikl]