 Edward became Edward Seymour, 1st Duke of Somerset, and is often, therefore, referred to as "Somerset".In addition, Thomas Seymour saw his brother rise, in the contentious and dangerous politics of the English Reformation, to the position of chief councillor with an approved title of "Protector" regent, referred to unofficially as Lord Protector of England, in effect, ruler of the realm as Regent for his nephew, the king.Thomas Seymour, unsurprisingly, began to resent his brother and the relationship between them began to dissolve.