Azog, Bolg et cie...

[Lomelinde]

-ce sont des Umaiar incarnés en un corps d'Orque (mais il est peu probable que Bolg est été un Umaiar, même si sont père en était un, à moins que sa mère n'est été aussi une Umaiar), comme l'était probablement Boldog;

Au sujet du Boldog, il y a de cec i qui peut être intéressant à noter (et probablement aussi intéressant concernant Gothmog) :

For Morgoth had many servants, the oldest and most potent of whom were immortal, belonging indeed in their beginning to the Maiar; and these evil spirits like their Master could take on visible forms. Those whose business it was to direct the Orcs often took Orkish shapes, though they were greater and more terrible. Thus it was that the histories speak of Great Orcs or Ore-captains who were not slain, and who reappeared in battle through years far longer than the span of the lives of Men.*

* [footnote to the text] Boldog, for instance, is a name that occurs many times in the tales of the War. But it is possible that Boldog was not a personal name, and either a title, or else the name of a kind of creature: the Ore-formed Maiar, only less formidable than the Balrogs.