(Bucconidae; Ϯ Rusty-breasted Nunlet N. rubecula) Mod. L. nonnula  nunlet, little nun  < dim. Med. L. nonna  nun  < Late Gr. νοννα nonna  nun  < νοννος nonnos  monk; "For the more debile and passerine form of Malacoptila, represented by the Bucco rubecula, Spix, and Lypornix ruficapilla, Tschudi, I propose the new generic or subgeneric appellation Nonnula, type N. rubecula (Bucco rubecula, Spix, Av. Bras. i. t. 39. fig. 1. p. 51).  The members of this section are much inferior in size to the true Malacoptilæ." (P. Sclater 1853).
Synon. Microtrogon.

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 15 December 2018).