There are multiple origins and translations for the name Geminus:
1. Latin name which actually means - "twin, double".
2. Derivative form of the name Germanus - "brother, full brother".
St Geminus was one of the 48 Martyrs of Lyons (177 AD). Also with him martyred at this time were: Blandina, Photinus, Zacharias, Epagatus, Macarius, Alcibiades, Silvius, Primus, Ulpius, Vitalis, Cominus, October, Philuminus, Iulia, Albina, Grata, Rogata, Oemilia, Potamia, Pompeia, Rhodana, Biblis, Quartia, Materna, Helpes, Sanctus, Maturus, Attalus, Alexander, Ponticus, Arisceus, Cornelius, Iosinus, Titus, Ivlius, Zoticus, Apollonius, Geminianus, Ivlia, Auzonia, Cemlia, Jamnica, Domna, Iusta, Trophima and Antonia.