Around the globe, Gerdia (Gerdia 
) is quite a rare epicene first name. The first name Gerdia is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a rare unisex name, and South Africa, where it is a very rare female name.
Silva, Terblanche, Geldenhuys, Kleynhans, Balombela, Hilliard, Harrigan, Ngowanit, Teixeira, Kibambanzoussi, Berrouet, Queiroz, Ikombongo, Viljoen, Lemoine, Guarino, Rossouw, Kobanga, Slagman, Venter, Exinor, Ngatse, Louden, Dolfsma, Punter, Keesee, Panes, Admas, Adams, Souza, Langenhoven, and Bezuidenhout