There seems to be several types of banks, and thus deposits.
Irish owned banks, operating in Ireland.
Irish owned banks, operating in EU.
Irish owned banks, operating outside EU.
EU banks, operating in Ireland.
EU banks, operating outside Ireland, but inside the EU.
EU banks, operating outside the EU.
Foreign banks (non EU), operating in Ireland
Foreign banks (non EU), operating in EU.
Foreign banks (non EU), operating outside EU
So nine types there. Banks operating outside Ireland but inside the EU may be in the exact same legal position as banks operating outside the EU.
I'm not sure if all deposits in Irish banks can be 'confiscated',.. surely only those deposits made in Ireland can be affected. (i.e.. all deposits made to banks operating in Ireland, banks regulated by the Irish regulator, and perhaps some online deposits).
All deposits made to foreign banks, but made in Ireland and subject to the Irish Regulator are likely 'confiscatable'. Deposits made in foreign countires to these banks may or may not be safe. All banks claiming to take deposits subject to some other law than Irish law should be safe, .. if these companies are prepared to go to court to protect your property rights in their foreign jurisdiction, .. (i.e not roll over if our government makes an illegal demand on them to garnish your deposits.)
(For example, BullionVault in the UK will fight such a case in the UK courts, if Ireland passes a law making private gold ownership illegal.. this is in their terms and conditions. Can the Irish government overide such a condition in a foreign jurisdiction?, I'd suggest not, at least not easily. So banks seeking customers in Ireland should also make strong claims as to the safety of the deposits, and their safety from Irish Government grabbers)
Deposits made outside the EU, to non EU owned banks should be safe from the Irish government.
So which category is Keytrade, Belgium?
What about AIB UK?
What about Northern Island, any safe banks up there?