how about that?

Isn't that surprising, remarkable, or pleasing. For example, They're engaged-how about that? [Colloquial; first half of 1900s]

Name	Pronounced	Usage
Caiden	KAY-dən	English (Modern)
Yishmeray	-	Biblical Hebrew
Addington	['ætiŋtən]
Pandora	pan-DAWR-ə (English)	Greek Mythology
Chinasa	-	Western African, Igbo
Lux	LUKS (English)	Various