Why do the Scots start chanting “Maccaulich” after their first victory?

Question

After the Scots take over the local garrison and execute the sheriff, everyone begins to chat "Maccaulich!" (which them seems to morph into Wallace). Is there a meaning to this word, a purpose to it, or some character in the movie that I missed?

Answer 1

According to IMDb they're chanting MacAulish, which means "son of Wallace."

Following the death of Murron MacClannough (Catherine McCormack), when the Scots took out the very first garrison of English soldiers, the crowd starts chanting 'MacAulish...MacAulish!' then changes to 'Wallace...Wallace!' Scottish surnames beginning with 'Mac' mean 'son of...'. Thus, MacAulish means 'son of Wallace.' The crowd is, in essence, cheering William as the 'son of Wallace' (referring to his father) and then Wallace himself.