Late L. occipitalis  of the back of the head, occipital  < L. occipitium  occiput  < ob  towards, over; caput, capitis  head.
● ex “Azur à Calotte et à Collier Noir” of Levaillant 1805 (syn. Hypothymis azurea).
● ex “Huppard” of Levaillant 1796, pl. 2  < French huppe  crest; Busard  hawk (Lophaetus).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 23 January 2019).