Yes. That is to say about half of my family are members of the order and about half of the order is my family.
>I was always curious how people get selected for those.
It depends on the society. You can go and sign up for the Freemasons but frankly they're not the nicest of people and won't treat you very well. However, if your father was a member, you're guaranteed to get in and, if he was a well respected member, you will be well respected yourself.
For smaller societies, of which there are more than you might expect, it's normally a fairly natural thing of people inviting others who they think might be appropriate. Though you have to remember we're quasi-religious and this shows through in the recruiting process. We're much more likely to invite people if there are weird coincidences or similar.
Recruitment via tests is also considered appropriate for occultists of our sort though you won't see it practised very much. Cicada is probably an example but I think they erred in advertising their intentions too explicitly.