Possible Clues:

• Paddy Irishman, Paddy Englishman and Paddy Scotchman perhaps offering money for what princess felt going to national school
• Poles, for example
• Irish and French people, say
• Citizens of 50 countries
• A race for the locals you'd associate with Dubliners, for instance
• Ethnic grouping comprising half of Greece's constituents?
• The French and Italians, say
• Poles, say, are up nose, weirdly
• Those from Rome, perhaps, could make Nero pause
• Maybe the French Open and US are to be rearranged