The genus name from the Greek ceras, meaning 'horn', which refers to the paired, spreading horny projections on the male and female sporophylls, and azaino; ' pinecone ' of all species. The species name honours Hilda Guerra Walker, daughter of Luciano Guerra, who first collected this plant. The male cones by Giuseppe Mazza, Monaconatureencyclopedia.com. The female cones by Giuseppe Mazza, Monaconatureencyclopedia.com.

