"Madainn mhath Anndra."
Translation:Good morning, Andrew.
Okay guys. The Vocative case happens when you are addressing a person or object. Vocative is where u put an 'a' before the person you are addressing as long as the first letter of the word IS NOT a VOWEL.
Also, for masculine words, you add an i. so 'balach' is the nominative form of 'boy'. But the Vocative form of 'boy' is 'a bhàlaich'. You can see that (in balach vs. a bhàlaich) i added an H and an 'i', and I put the vocative particle 'a' at the beginning. (And the acent mark over the first 'a'. In Gaelic all accent marks pòìnt thè sàmè wày.)
I hope this will help y'all