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Brockhaus-1911: Hildebrandt [2] · Hildebrandt
Herder-1854: Hildebrandt [2] · Hildebrandt [1]
Pagel-1901: Hildebrandt, Hugo Alfred Otto
Pataky-1898: Hildebrandt-Eggert, Gertrude · Hildebrandt, Frl. Clara · Hildebrandt, Frau Martha · Hildebrandt, Wilhelmine
Pierer-1857: Hildebrandt