Circassians are really extreme
. You cannot even marry a girl from your own village because all of the children in your village are raised together like actual siblings. You have to marry a person from another village but then again, they don't have any kind of dowry traditions, if I recall correctly.
They have adopted surnames hundreds of years ago...
...and woman usually don't adopt the name of the husband. Their understanding of Islam is very regional and traditional. They tend to be secular minded in Turkey.