I have also heard that this comes from Hopi girls :)
The main thing that makes me confused is that some people claim that they have tried hard to remake those hairstyles and consider it impossible.
However we all here in good mind and memory see that she actually wears all those hairstyles :)
Is it her own hair or a combination of natural hair and some hair extensions maybe that she wears during the whole trilogy?
Are there known ways of making exactly those true hairstyles or they did not survive till the present day? I suppose it should all be documented in some make up charts and such things so if one tries hard enough all that can be found and after spending those famous hours on that those true hairstyles can be made up without socks and such stuff. Do you think that is correct?
For example I have recently been at a high school graduation party and there I have seen many girls with hairstyles certainly not less complex than ones Leia had. In everyday life all those girls have nice long hair but still it is nothing unusual. They also claim that they have spent lots of time making those from their own natural hair.
So we can see at least that such things are possible outside the movies in our life :)