Unless stated otherwise, all information herein is taken from A Memory of Light, Chapter 36.
Sigmont is a new young recruit in the Tower Guard. He appears to have been raised in a city. Mat reckons he is not a day over fifteen. He wants to learn the sword not the quarterstaff, as he believes it would be easy.
Mat teaches Sigmont and other new recruits some basic quarterstaff techniques and how to stand firm.
"If the boy whose staff he had taken was a day over fifteen, Mat would eat his boots. He would not even boil them first!"
"Well, Sigmont, how much time do you think we have? Maybe you could wander out, talk to the Dreadlords and the Shadowspawn and ask them to give me a few more months' time so I can train you all properly." (Mat)