From Carmarthenshire, as an undergraduate, Liam studied at Yale-NUS College (Singapore) and Yale University (USA), majoring in Philosophy, Politics & Economics (PPE).
O Sir Gaerfyrddin, fel myfyriwr is-raddedig, astudiodd Liam yng Ngholeg Yale-NUS (Singapôr) a Phrifysgol Yale (USA), gan raddio mewn Athroniaeth, Gwleidyddiaeth ac Economeg.