Republic of Ireland Adapter?

It is the same as that used in the UK.

Rick, of course, has some help:
https://www.ricksteves.com/travel-tips/phones-tech/electric-adapters-converters

What you need is the clunky old UK adapter with three squarish pins in a triangular pattern.

Remember that European voltage is 230V not 120V as in the USA. Most modern electronics are labeled as dual voltage and you won't need a Voltage Converter, just the plug adapter, but for heaven's sake, check first!

We are very fortunate that we travel off the grid and without the need for electric hairdryers and razors. Our only electronics are for the dedicated battery charges for our cameras, which, fortunately, are very small. If you check what is available at your lodgings, you might be able to pare down what you need to take.

the clunky old UK adapter

you mean the best one on the planet

http://www.fastcodesign.com/3032807/why-england-has-the-best-wall-sockets-on-earth