Barry John, the former Wales and British and Irish Lions rugby union fly-half, has died aged 79, his family have said in a statement.
He died peacefully in hospital, his family announced.
A family statement read: “Barry John died peacefully today at the University Hospital of Wales surrounded by his loving wife and four children.
“He was a loving Dadcu [grandfather] to his 11 grandchildren and much-loved brother.”
The fly-half won three Five Nations titles, a Grand Slam and two Triple Crowns – while also playing five Tests for the British and Irish Lions.
He formed an effective half-back partnership with Gareth Edwards during the 1960s and 70s, both for their country and at club level for Cardiff.