take a guess

and hazard a guess; make a guess

to guess. Even if you don't know, please take a guess. If you don't know the answer, hazard a guess.

Name	Pronounced	Usage
Jeroboam	-	Biblical
Firminus	-	Late Roman
Herrington	['heriŋtən]
Russel	RUS-əl	English
Augustinus	-	Ancient Roman
ÁSmundr	-	Ancient Scandinavian