Everyone know s Krypton had this feudal family affiliation system where everyone was a member of some house(major or minor) and bore the name of that house.
The most famous is the House of El.
What are the others? We can see their names since the various Kryptonians bear them. But how much do we know about their histories?
Here's a few I can remember without looking them up:
Dim < Nadira Va-Dim, one of Zod's associates came from here
El < Superman
Em < Dev-Em
Rel < Az-Rel, team Zod
Vex < Car-Vex, team Zod (among others)
Zod < Dru-Zod the general infamous for the revolt in Krypton's last days came from here
How many of them have actually been described in any real detail?