Who was the Kardashian's biological father?

The Kardashian family's biological father was Robert Kardashian. He was an attorney and gained widespread recognition for his role in the O.J. Simpson trial in the 1990s. Robert Kardashian was married to Kris Jenner, and they had four children together: Kourtney, Kim, Khloé, and Rob Kardashian. He passed away in 2003 due to cancer.