Madam, - In 1978, the British embassy in Dublin noted that Ireland suffered from a potent inferiority complex towards Britain in (The Irish Times December 31st).
That would certainly explain why so many Irish institutions retain the word "royal" in their titles - eg, the Royal Irish Yacht Club, the Royal Dublin Society, the Royal College of Surgeons, Royal Dublin Golf Club, etc.
If there are other explanations, perhaps other readers might offer them. - Yours, etc,