Leland Cobain, Kurt Cobain’s grandfather, died yesterday in Montesano. He was 89 years old. GrungeReport.net sends its best wishes to the Cobain family. Cobain frequently communicated with fans of his grandson and Nirvana, exchanging letters and inviting fans into his home to discuss Kurt. Leland was the only member of the Cobain family who stated that he believed Kurt was murdered.