John Joseph O'Neill's brother that is currently in the band plays what role?
John O'Neill (guitarist):  O'Neill, along with his younger brother Vincent and friends Feargal Sharkey, Michael Bradley and Billy Doherty, founded The Undertones in 1975, although Vincent O'Neill was replaced the following year with his younger brother Damian O'Neill, who became the band's lead guitarist. The Undertones:  From 1975 to 1983, the Undertones consisted of Feargal Sharkey (vocals), John O'Neill (rhythm guitar, vocals), Damian O'Neill (lead guitar, vocals), Michael Bradley (bass, vocals) and Billy Doherty (drums).
lead guitar, vocals