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Son of Johannes Leopold Gahlnbäck and Emma Elisabeth Gahlnbäck Husband of Мизи Half brother of Leopold Иванович Galnbeck; Петр Иванович Gahlnbäck; Heinrich Andreas Иванович Galnbeck; Judit Ивановна Galnbeck; Eva Henriette Gahlnbäck and 1 other; and Artur Ivanovich (Ioganesovich) Galnbek « less
https://de.wikipedia.org/wiki/Hans_Gahlenbeck