Yes, the Einzberns are both older and more specialized than most families that practice. My family has been practicing for nine generations including myself, and we're a bit more diverse about what we study. My personal specialty is spiritual evocation, but I do have background in alchemy, necromancy, and other things of that nature.

They're also fairly isolated - most European magi tend to be part of the Mages' Association, which is a kind of governing body.