Question: The professional boxer, who held the WBO ligh-middleweight from 2015-2016, has a younger brother who is also a professional boxer; what is this brother's name?
Sentence (from "Liam Smith (boxer)"): He held the WBO light-middleweight title from 2015 to 2016, having previously held the Commonwealth light-middleweight title from 2012 to 2013, and the British light-middleweight title from 2013 to 2015.
Relevant evidence: Yes