Astonished outburst

• Mild oaths of yore
• "Jiminy crickets!"
• "Zounds!" relative
• Relatives of "Zounds!"
• "Holy Toledo!"
• "OMG!" ancestor
• 'My word!'
• Kin of 21 Down
• “Oh my goodness!”

Wiktionary Word definitions in Wiktionary
interj. (alternative form of egad egad! English)