pointName

The name of the data point, shown in the tooltip by default.

dataSeries: [{
    data: [
        {
            x: 161,
            y: 151,
            pointName: "London"
        },
        {
            x: 170,
            y: 159,
            pointName: "New York"
        },
        {
            x: 172,
            y: 155,
            pointName: "Paris"
        }
    ]
}]