The child emperor Romulus Augustulus was deposed by Odoacer. He was the last western Roman emperor.
Citation:
Bouchard, Elsa. "Deposition of Romulus Augustulus".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11600, accessed 19 May 2013.]