Seidenfaden (German for silk thread) may refer to:

• Tøger Seidenfaden (1957-2011), Danish journalist
• Gunnar Seidenfaden (1908-2001), Danish diplomat
• Erik Seidenfaden (ethnologist) (1881–1958), Danish ethnologist
• Erik Seidenfaden (journalist) (1910-1990), Danish journalist
• Seidenfaden, a part of the municipality Wipperfürth in North Rhine-Westphalia, Germany

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