Certainly, Nguyen is the one of first names of many people in Vietnam, only in Vietnam.

"Results": [
    {
        "TypeName": "PER",
        "Text": "Nguyen",
        "Start": 11,
        "End": 17
    },
    {
        "TypeName": "LOC",
        "Text": "Vietnam",
        "Start": 62,
        "End": 69
    },
    {
        "TypeName": "LOC",
        "Text": "Vietnam",
        "Start": 62,
        "End": 69
    }
]