Tô Hiến Thành
... that during the Lý Dynasty, Tô Hiến Thành was the only person outside the royal family who was titled Prince (Vương)?
... that during the <a class="mw-redirect" href="./Lý_Dynasty" id="mwG5I" rel="mw:WikiLink" title="Lý Dynasty">Lý Dynasty</a>, <b id="mwG5M"><a href="./Tô_Hiến_Thành" id="mwG5Q" rel="mw:WikiLink" title="Tô Hiến Thành">Tô Hiến Thành</a></b> was the only person outside the royal family who was titled Prince (Vương)?