You could go into court and point this out, but the Judge may say that it's obvious its you and proceed. Alternatively, they could re-issue the summons with the correct details and you'll be back in court at a later date.
You got the letter, so the address must be close enough to be sure its you. Anyway, postal addresses in Ireland seem to be a moveable feast - we're all familiar with instances of people on the same street using different suburb names in Dublin (because one is posher than the other) and even wrong post codes etc. In country areas, Townlands seemed to be interchangeable in many addresses.
They put cameras on some Stop sign junctions nowdays, so there is a real danger that the Gardai will simply play a video of the incident in Court.