In the blog post, Brendan Gregg confirms that that is indeed his actual email address at Intel. That's actually an impressive recognition of Brendan's capabilities. I wonder how many engineers at Intel have a <firstname>@intel.com email address.
Requested my first name, it was available. I constantly got people asking questions in amazement at my email address - how did I do it??? I would just shrug and say "I asked".
(Sometimes I get her personal email to my gmail.)