Robert Plant married Maureen Wilson on 9 November 1968. The couple had three children. A daughter Carmen Jane and two sons Karac Pendragon and Logan Romero. The couple divorced in August 1983. Plant also has a younger son named Jesse Lee with the sister of his first wife, Shirley Wilson.

On July 26, 1977, his son Karac died at the age of five to a stomach virus while Plant was engaged on Led Zeppelin's concert tour of the United States, it nearly split the band completely. It was a devastating loss for the family.

The Plant family's terrible tragedy came during what was supposed to be a triumphant American tour for Zeppelin. Two years earlier, the band had been forced off the road for an extended spell when Plant and his wife were involved in a serious car accident while visiting the Greek island of Rhodes. But even if the time off helped Plant recuperate from his injuries, it did nothing to prevent a series of disasters that dogged the tour, starting with Plant picking up a case of laryngitis that forced the group to push its first date back from February to April.

Karac's death later inspired him to write several songs in tribute: "All My Love" featured on Led Zeppelin's final studio album, 1979's "In Through the Out Door", "Blue Train" featured on Page and Plant's second and final album and 1998's "Walking into Clarksdale". The song "I Believe" on Plant's solo album "Fate of Nations" is another tribute to his late son.

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