He was a pharmacist.
[The Küstner family genealogical table provides only his profession; his birthdate here is my estimate/bracket, based on the assumption that he was older than his wife.
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Hans is 38 degrees from Robin Helstrom, 39 degrees from Katy Jurado and 22 degrees from Victoria of the United Kingdom of Great Britain and Ireland on our single family tree. Login to find your connection.