| Name | Date | Month | Icon | Bios |
| FILOSOFOS (Filosofos) | 1 | May | | |
| ISIDORA (Isidora, Dora) | 1 | May |  |  |
| JEREMIA (Ieremia) | 1 | May | | |
| PANARETOS (Panaretos) | 1 | May |  |  |
| TAMARA (Tamara, Tammara, Tamar) | 1 | May |  |  |
| AVGERINOS (Avgerinos, Avgeris, Avgerou, Avgerini, Ava) | 2 | May | | |
| BORIS, BORYS, MPORISOS (MICHAEL) (Boris, Borys, Mporisos (Michael)) | 2 | May |  |  |
| ESPEROS (Esperos) | 2 | May | | |
| MATRONA (3) (Matrona of Russia - The Blind) | 2 | May |  |  |
| RODOPI (Rodopi, Rodopee) | 3 | May | | |
| MELIA (Melia) | 4 | May | | |
| MICHAEL TAXIARCHIS ARCHANGEL OF MANTAMADOS, LESVOS ISLAND (*) (Taxiarchis Archangel Michael of Mantamados, Lesvos island, Michail) | 4 | May |  |  |
| MYROFORA (*) (Myrofora, Myrrh-Bearing Woman) | 4 | May | | |
| EFRAIM (Efraim) | 5 | May | | |
| EFREM (Efrem) | 5 | May | | |
| EIRINAIOS (3) (Eirinaios, Irenaeus) | 5 | May | | |
| IRINI (1) (Eirene, Eirini, Irene, Irini, Rene, Rena, Renia, Rhenia) | 5 | May |  |  |
| IOV (1) (Iov, Job, Iovia, Iobia, Jobia, Jovia, Iovi, Iobi) | 6 | May |  |  |
| SERAPHIM (1) (Serafeim, Serafim, Serafina) | 6 | May | | |
| (no widely known nameday) | 7 | May | | |
| MELIOS (Melios, Milios, Melio, Milio) | 8 | May | | |
| THEOLOGOS (Theologos) | 8 | May | | |
| CHRISTOPHER (Christoforos) | 9 | May |  |  |
| ESSAIAS (Hesaias, Isaias) | 9 | May | | |
| SIMON (Simonas, Simon) | 10 | May |  |  |
| ARGYRIS (Argyris) | 11 | May |  |  |
| ARMODIOS (Armodios) | 11 | May | | |
| BATHSHEBA (*) Bathsheba, Bathsheeba, Bersave, Bersebe, Verseve, Beersheba, Virsaviya, Varsavia | 11 | May |  |  |
| DIOSKOURIDIS (Dioskouridis, Dioskoridis, Dioskoros) | 11 | May | | |
| METHODIOS (1) (Methodios) | 11 | May | | |
| MOTHER'S DAY (*) (Mother's day) | 11 | May | |  |
| OLYMPIA (Olimpia) | 11 | May | | |
| EPIFANEIOS (Epifanios) | 12 | May | | |
| THEODOROS (3) (Theodoros of Kythera, Thodoris, Theodore, Teo, Thodora, Theodora) | 12 | May | |  |
| GLYKERIA (Glykeria) | 13 | May | | |
| ARISTOTELE (Aristotelis, Telis) | 14 | May |  |  |
| ISIDOROS (2) (Isidoros) | 14 | May | | |
| THERAPON (Therapon) | 14 | May |  |  |
| ACHILLIOS (Achillios) | 15 | May | | |
| KALI (Kalee, Kaylee) | 15 | May | | |
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| PAHOMIOS (Pahomios, Pahoumios, Pahos) | 15 | May | | |
| (no widely known nameday) | 16 | May | | |
| ADRONIKOS (1) (Andronikos, Androniki) | 17 | May | | |
| JUNIA (Iounia) | 17 | May | | |
| SOLON (Solon, Solonas, Solohon) | 17 | May | |  |
| FAEINI (Faeini) | 18 | May | | |
| GALATEIA (Galateia) | 18 | May | | |
| JULIA (1) (Ioulia, Julia, Jule, Julie) | 18 | May |  |  |
| PHOTINI (*) (4) (Fotine, Fotini, Foto, Fotoula, Fay, Fofo) | 18 | May |  |  |
| MAGDALINI (1) (Magdalena, Magdalene, Magdalini, Markella, Magda) | 19 | May | | |
| MARYLENA (Marylena, Maryelena) | 19 | May | | |
| MEMORY OF GREEK PONTIOS GENOCIDE (Memory of Greek Pontios Genocide) | 19 | May | | |
| MENANDROS (Menandros) | 19 | May | | |
| PATRICK (Patrikios, Patricia) | 19 | May | | |
| THEOGNOSTOS (Theognostos, Theognosios, Theognosia) | 19 | May |  |  |
| THEOKTISTOS (Theoktistos) | 19 | May |  |  |
| LEEDA (2) (Lida) | 20 | May | | |
| LIDIA (2) (Lydia, Lidia, Lidie, Lyda, Lydie) | 20 | May |  |  |
| LITO (Lito, Leeto, Leto) | 20 | May | |  |
| CONSTANTIN (Konstantinos, Kostantinos, Kostas, Costas, Constantine, Costantine, Gus) | 21 | May | | |
| CONSTANTINA (Thina, Kostantina, Dina, Costantina) | 21 | May | | |
| HELEN (Elena, Elene, Ellen, Eleni, Lena, Eleanor, Eleonora, Eleonor, Nora, Marilena) | 21 | May | | |
| NANTIA (Nantia, Nandia, Nadia, Nadya) | 21 | May | | |
| EMILIOS (Emile, Emilia, Emily, Emma) | 22 | May | | |
| KODROS (Kodros) | 22 | May | | |
| (no widely known nameday) | 23 | May | | |
| CHRISTIAN (Christian) | 24 | May | |  |
| MARKIANI (Markiani) | 24 | May | | |
| PALLADIA (Palladia) | 24 | May | | |
| PHOTINI (2) (Fotine, Fotini, Foto, Fotoula, Fay, Fofo) | 24 | May | | |
| (no widely known nameday) | 25 | May | | |
| ALFAIOS (Alfaios, Alfeos) | 26 | May | |  |
| KARPOS (2) (Karpos) | 26 | May | | |
| SINESIOS (Sinesios) | 26 | May | | |
| ALYPIOS (Alypios) | 27 | May | | |
| IOANNIS ROSSOS (Ioannis Rossos) | 27 | May | | |
| DIMITRIOS (2) (Demetris, Dimitris, Dimitrios, Mitros) | 28 | May |  |  |
| DIOSKOURIDIS (Dioskouridis) | 28 | May | | |
| IPOMONI (Ypomoni) | 29 | May |  |  |
| Memory of the Defeat of Kostantinoupolis by the Turks in 1453 | 29 | May | | |
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| NEFELI (*) (Nefeli) | 29 | May |  |  |
| OLIVIANOS (1) (Olivianos, Olvianos, Olivia) | 29 | May | | |
| THEODOSIA (Theodosia) | 29 | May | | |
| EMMELEIA (Emeleia, Amy) | 30 | May |  |  |
| ERMEIAS (Ermeias, Ermeia) | 31 | May | | |
| MAGOS (Magos, Maya) | 31 | May | | |