Kilroy F****n Jones is a PhD thesis of two parts: a novel, and an evaluative critical commentary based around elements explored in Kilroy F****n Jones. The novel itself is about a young man still grieving for what he sees as his abandonment by both parents. Denied a stable family home, he has set out on a path of hedonism and reactionary thinking which can only inevitably lead to tragedy. The critical commentary, consisting of five chapters, explores the themes of identity, masculinity, the underclass, the Welsh novel, and the two primary dialects of south east Wales: Cardiff English and Wenglish. These chapters demonstrate the critical decisions I made during the creative process, which in turn substantiate the significance of such elements as Kilroy's point of view and character. Taken as a whole, they explain the Welsh - and indeed Cymraeg - nature of the story itself.