Is "Barnet" meaning "hair" at all related to the London borough of Barnet?

Posted by PolylingualAnilingus@reddit | AskUK | View on Reddit | 70 comments

I heard someone say in a video today that many people in the UK, especially London, say "Barnet" to talk about hair. Like "my Barnet is getting too long". I also know there's a borough with that same name. Are these related in some way?