The term originated at a time when the
feudal baron was the only substantive degree of nobility. The feudal baron held his lands directly from the king as a
tenant-in-chief by the
feudal land tenure. This gave him the obligation to provide knights and troops for the royal feudal army. Barons could hold other executive offices apart from the duties they owed the king, such as an
earldom, though immediately after the Norman Conquest of 1066, very few barons did. An Earl, at the time, was the highest executive office concerned with
shire administration, holding higher responsibilities than the
sheriff, whose title would later evolve into a
Viscount. The privilege attached was the right, indeed the obligation, to attend the king in his feudal court, termed the
Council de Baronage, a precursor to the modern
Parliament, in order to advise and support him. ==Evolution of the title==