Gr. ἱεραξ hierax, ἱερακος hierakos  hawk.
● (syn. Accipiter Ϯ Eurasian Sparrowhawk A. nisus) "Ierax fringillarius, ♂.  Sparrow Hawk, male." (Leach 1816).
● (syn. Microhierax Ϯ Collared Falconet M. caerulescens) "IERAX.  {cærulescens. Linn.  Edw. pl. 108.  Horsf. Zool. Research.  Pl. Col. 97." (Vigors 1824); ""Ierax." - This word, although it has been generally used as above written, should more properly be written "Hierax." I therefore wish to substitute the more classical, for the more customary, orthography." (Vigors 1826).  Var. ZeraxJerax, Hierax.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 13 December 2018).