Blake: it's a bit too surname-y for me, but it sounds intelligent and lively.
Blair: bleh.
Briar: sounds too delicate and weak, like the name of a Disney princess.
I wouldn't use any of them, but
Blake is my favourite. I'd consider using
Brontë instead.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080