Okay, taking a step back here from my original answer…
Europe is comprised of many countries. Each country has their own rules and regulations when it comes to issuing citizenship. Yes, the countries have been working to make it easier for citizens of their countries to travel around Europe with less hassle, but it doesn’t open up the rights of of one to another, like voting.
As for citizenship, there are just way too many variables, so let’s narrow it down to the OP’s case and toss in @zenvelo.‘s
@choreplay As far as I know, there is no “European citizenship’ that encompasses all European countries.. The country in question is Ireland, and it is specifically about qualification through birth rights. Again, the quick answer to your question is “Yes, you qualify for consideration.” Ireland’s process looks easier than others, but their is still paperwork, costs, and probably other factors involved. You just have to do the research to find out. For example, does it make a difference what country you currently hold citizenship in? Will Ireland make you relinquish that citizenship, or will they allow dual citizenship? What if you were adopted? Would that still count? Do they require that you live there?
@zenvelo As for being a grandchild of a British subject, the rules have changed over the years and have even more if/then guidelines than before. If you are truly curious, here is a site that might help answer some of your questions.
The other area that may make it even stickier is when we throw around names like Ireland, United Kingdom and Great Britain.
* The United Kingdom of Great Britain and Northern Ireland (UK for short) is made up of England, Scotland, Wales and Northern Ireland. Note that it does not include The Republic of Ireland.
* Great Britain is made up of England, Scotland and Wales.
* As for Ireland, I have no clue how their government process works. Where do they draw the line between The Republic of Ireland and Northern Ireland? Are the citizenship laws the same for both, or do they differ?
@WrongW‘s final comment is really what it comes down to: Just think if it’s worth the effort, if you really need this citizenship.
Personally, I just think it’s cool that you can say that you could be an Irish citizen based upon birth rights.