Complex sentence: The name Boldog was used by several Orc chieftains during the First Age, and it probably was actually a name for lesser Maiar, servants of Morgoth, in orcish hroa.
Split into simpler sentences: The name Boldog was used by several Orc chieftains during the First Age. It is very likely that Boldogs were actually a lesser Maiar, servants of Morgoth, in orcish hroa.