Sarah,
The "Suite" were all of the Nobles attached to the IF, Ladies in Waiting, Aides de Camp, Baron Freederickz (Who actually was the other exception, as he was so old and already ill he was left alone and died shortly afterward), etc.
The "Household" were the servants, Maids, Cooks, Valets, Volkov, etc. Obviously, some members of the "household" were murdered in Siberia, Demidova and Schneider, so whoever wrote that "fact" was incorrect.
I hope this helps.