Ekaterina Nikolaevna Arsenieva (1778–?): Eldest daughter of Major General Nikolai Arseniev (chief of staff of Count Alexander Suvorov) and V.I.Ushakova. Studied at the Smolny Institute. Lady-in-waiting to Empress Marie Fyodorovna (1796). Married full state councillor P.F.Kozlov (1800).
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