It doesn't really say. In the fire at the Hotel, it probably killed almost every secondary character in the series with the exception of the Quagmires, Fiona, Fernand, Capt. Widdershins, Phil, and Hector . I think that only the Baudelaire orphans, Olaf, and Kit survived out of every person who was actually was in the hotel.
Count Matchuki died in 1995.
Count Lützow died in 1916.
Count Erich Kielmansegg died in 1923.
Count Gustav Kálnoky died in 1898.
Count Sensenderfer died on 1903-05-03.
Count Ossie died on 1976-10-18.
Count Gedney died on 1922-03-26.
Count Primo Magri died in 1920.
Count Campau died on 1938-04-03.
Count Camillo Marcolini died in 1814.
Count Patrick D'Arcy died in 1779.
Jaime Rest died in 1979.