Personally I would just use nicknames :)

Truthfully I don’t think I’ve ever asked anyone about including them, nor have I ever been asked. I’ve only had this blow up in my face once. It was that time that my Brother’s girlfriend read my entry that talked about her and how I was hurt that my Sister wanted to hang out with her and not me the wrong way. The entry was focused more on my family and how I was feeling rejected, not about her. I even mentioned in the entry that I wanted to get to know her better and be friends. I never did take the entry down but I did try to explain and apologize to her after my Brother called and tried to murder me over the phone.

As I write that and think about it, I begin to think about Facebook. If these people have facebook and you name drop them on there and they are cool with it, then mentioning on your blog with a first name shouldn’t be a problem or even require an ask. You don’t ask before doing it on Facebook, talking with your other friends, so I don’t see why a blog would be much different.