Bruccius the Orphan is an Imperial beggar living in Cheydinhal. His bedroll and food bag are behind The March Rider.
Bruccius is one of the few beggars who can provide information on how to join the Thieves Guild, even joining the Hero for one of the quests.
The Hero needs to speak to one of the beggars in Cyrodiil in order to learn about the Gray Fox.
The Hero needs to ask one of the beggars about the Castle of Anvil.