"Go away, Calum!"

Translation: Thalla, a Chaluim!

[WolfoftheWoods]

Why is there an "a" before Chaluim?

[silmeth]

That’s the vocative particle, it’s always used before consonants when you address someone directly (like here: a Chaluim when speaking directly to Calum).

[WolfoftheWoods]

Thank you!

[jade301135]

Why is the a not used before Fergus but is before Calum?