BoM/TWS Message Forum

What are you looking for, places that they're mentioned? There's not a huge amount written on them. From my own memory of times they were mentioned.

imaj's line beginning with "Lost Souls"  is the place that goes the most in detail into the 3 named Keyserling warlocks, and talks about the kind of magic they hid in the University library. The section of imaj's retrograde Will story from "A Mysterious Reappearance"  on touches on the university, though I haven't read that part of the story in a few years, so I don't remember if it went into any detail at all about the family. It certainly makes use of the magic hidden in the library.

The Keyserlings arranged for a mob to sack Cuthbert in Florence Shabbleman's childhood as told in "A Transformation, Part 1" 

Julius also apparently fought for the Nazis in WW2, according to "The Wake: Fyodor's Tale" , as the leader of a group of necromancers called the Ordo Mortis.