Johnny Cash became "obsessed" with his Scottish roots after discovering his family was connected to King Malcolm IV of Scotland.

Cash found out about his Scottish roots after he sat next to Major Michael Crichton-Stuart, keeper of Falkland Palace, on a flight to America in the 1970s.

Cash mentioned that he had heard that his family originated in Scotland and the keeper told the singer that he knew of farms and streets in Fife that still bore the Cash name.

Cash visited a genealogist and discovered that he was of Scottish descent and that his clan had originated around the 12th century in the Strathmiglo area.

The connection was traced back to when the niece of Malcolm IV (1153-65) - who was named Cash or Cashel - married the Earl of Fife.

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