Read a name file from the data directory

        :param filename: Name of the file to read.
        :return: A list of name entries.

def _read_name_file(self, filename):
        """Read a name file from the data directory

        :param filename: Name of the file to read.
        :return: A list of name entries.
        """
        file_path = os.path.join(self._DATA_DIR, filename)
        with open(file_path) as f:
            names = json.load(f)

        return names