take a stab in the dark

To make a guess or estimate with very little or no assurance as to its accuracy. I had absolutely no idea what the answer was for the last question on the exam, so I just took a stab in the dark and hoped for the best.

Common Names:

Name	Pronounced	Usage
Nour	-	Arabic
Luther	LOO-thər	English
PatrÍCia	pə-TREE-syə (Portuguese)	Slovak, Portuguese
Bains	[beinz]
Akachi	-	Western African, Igbo
Alven	['ælvən]