The genus Hieraaetus, sometimes known as small eagles or hawk-eagles, denotes a group of smallish eagles usually placed in the accipitrid subfamilies Buteoninae or Aquilinae.

1/ Booted eagle (Hieraaetus pennatus) 

Accipitriformes, Accipitridae:
Accipitridae from Latin accipiter/accipitri- "hawk".
accipitrinus Latin accipitrinus hawk-like (accipiter: hawk).

Hieraaetus is derived from Ancient Greek: hierax (ἱέραξ), meaning "hawk," and aetos (ἀετός), meaning "eagle".