forewarn about

forewarn someone about something

and forewarn someone of something

to warn someone about someone or something. They forewarned us of your strange behavior. Didn't we forewarn you about Max's problem?

Name	Pronounced	Usage
Liam	LEE-əm (English)	Irish, English
Venetia	-	English
Banu	-	Persian, Turkish
Flaviana	flah-VYAH-nah (Italian)	Ancient Roman, Italian
Jeffery	['dʒefri]
Stepane	-	Georgian