Occurrence of Masculine Given Names by Century 

These names are first grouped by century, then the number of occurrences which include variant spellings.

Variant spellings are separated by a slash < / >.  Some Greek name transliterations such as Kasta/niton and Kle:/me:s include slashes and are italicized. The slash in these names represent the acute accent.

10^th Century  

Andrea 

11^th Century  

Leon – 15

Joannis /Johannes- 11

*Kostantinos/ Konstas –10

Theodoros,  Nikolaos/ Nicolo –9

Georgios/Giorgios, Ursos - 4

Elia/ Elias, Petros/Petrus, Philippos/ Philipos -3

Ae/o:n, Basileios/ Basilios, Martinos, Nikephoros, Theophanios/ Theophanis –2 

Names occurring once:

Alexandros, Andreas, Arkudios, Barbaros, Beato, Blasios, Calochino, Dimitrios, Eudokimos, Galatos, Isaias, Kasta/niton, Kle:/me:s, Michael, Nikodemos, Photinos, Photis, Raos, Robertus, Theodotos. 

12^th  Century

Joannis/ Janninos/ Johannes-59

Nicolaus/ Nikolaos/ Nikolaos Anastasios -58

Leon/ Leoni- 41

Basi/leios/ Basilios/ Vasilios-20

*Costantino/ Konstantinos/ Konsta/ Konstas/ Kostas -18

Petros/ Petrus/ Pie/tros –17

Robertos /Robertus/ Roube/rtos /Ropertos /Rupertus –14

Gregorios/ Grigorios/ Glegorios - 10

Rokerios, Rogerios/ Rogerius-9

Gulielmos/ Guliemus/ Gillialmos/ Wilelmus, Theodoros/ Theodorus-8

Andrea/ Andreas, Arkadios -7

Nikephoros/  Nikophoros -6

Rikardos/ Rikkardos Georgios -5

Philippos, Stephanos/ Stephanus -4

Bartholomaios/ Bartolo/ Bartolomeus, Galteri/ Galterios, Rao/ Raos-3

Goffridus/ Josfres, Kho:ri/on, Matthaios, Nikitas/ Nikitis, Otos/Oto, Sergios, Thyrsos,

Tomas /Tomaso-2 

Names occurring once:

Ae/o:n, Alexandros, Alpertos, Alphanos, Anastasios, Asimios, Askinos, Askintinos, Belloprandos, Benegka/sa, Biamundus, Burrellos, Damianos, Daniel, Donadeos, Drogo, Elias, Enruinus, Gervikos, Gustanos, Jophos, Julianos, Lambertus, Larentzos, Leopardosetros, Martinos, Michael, Mules, Neophytos, Nikandros, Pankallos, Paschalios, Perroni, Phrankpetros, Sabinus, Sarullos, Spatharios, Staulos, Tristianus, Turusanos, Ursos, Vitalis,  Zacharias 

13^th Century 

Joannes/ Joannis/ Ioannis/ Johannes -33

Nicolaos /Nikkolaos/ Nicolaus/ Nicolai -34

Basilios/ Basileios -19

Leo/ Leon –18

Bartholomaeus/ Bartholomaios/ Bartholomeus/ Bartolomeo, Matheus/ Matteo/ Matthaeus/ Matthaios/ Mattheos -8

*Constantinus/ Costans/ Konstantinos/ Konstas, Guillelmus/ Gulielmos/Guglielmos,  Petros /Pietro/ Perri -6

Philippos /Philipanos –5

Andreas, Gregorios/Grigorios, Peregrinos, Robertos/Rupertos -4

Marcus/ Markos-3

Alexandros, Anastasios, Gerardo/ Girardos, Jacobus, Paulos, Rao/ Raos, Rikkardos, Stephanos/ Stephanus-2 

Names occurring once:

Angelus, Arnulfus, Bennardino, Bonagiuntos, Daniele, Errigos, Fernandino, Galterios, Garinos, Georgios, Goffredus, Kakuris, Laurentius, Lukas, Manilos, Marinos, Martinos, Maurus, Michael, Nikitis, Obertus, Pantaleo, Pelegrinos, Perrunos, Renaldos, Rogerius, Sergius, Silvester, Theodoros, Thomas, Venturas, Zacharia. 

14^th Century  

Nikolaos/ Nicolo /Nicolaus/ Nicola –9

Giovanni/ Giovanniccio/ Giovannino -8

Antonio, Franciscus/ Francus, Goffridus/ Coffredo-2 

Names occurring once:

Andrea, Angelus, Arrigo, Artidoro,  Bartolomeo, Basilius, Bernardus, Cirillo, Giacomo, Gottifredo, Gualterius, Johannes, Konstantinos, Leo, Manfredi, Michael, Rimbalso, Roggiero, Sacazio. 

15^th Century  

Antonius /Antonio/ Antonello-8

Giovanni/Giovanello/ Giovan Nicola/ Giov. Dom. /Giov. Ant. –8

Francesco -5

Nicola/ Nicolo/ Cola –4

Domenico, Giacomo, Paolo -3

Petro /Pietro –2 

Names occurring once:

Alberico, Alfonso, Aloisio, Arrigo, Baltasar, Bartolo, Battista, Berlingeri, Blasco, Egidio, Filardo, Guglielmo, Gregorio, Lancillotto, Mario, Orazio, Pandolfo, Roberto, Salvatore, Tommaso, Troylo, Tuzio. 

16^th Century  

Nicola/ Nicolaus /Cola /Colacello-11

Giovanni/ Giov. Paolo/ Giovanni Andrea/ Giov. Ant./Giovanni Battista /Giovanni Francesco –10

Francesco/ Francischus  -10

Petri/ Pietro -5

Gaspare, Antonio/ Antoni,  Jacobo/ Jacopo Antonio/ Jacopello, Geronimo/ Girolamo –4

Andrea, Cesare, Domenico, Mario, Matteo -3

Ascanio, Baldassarre, Bastiano, Bernardino/ Bennardino, Ferdinando, Ferrante, Giacomo, Leonardo,  Marco/ Marcantonio, Michele,  Minichus/ Minico, Paolo, Vincenzo –2 

Names occurring once:

Aloisio, Altobellus, Arminio, Aurelio, Belloro, Braha, Camillo, Crispino, Criste, Damiano, Eleazarus, Emilio, Enaco, Filippo Flaminio, Gabrielle, Gactus, Garzia Maria, Geraldino, Gervasio,  Giuseppe, Graziano, Gregorio, Guarino, Luca, Joseph, Manuel, Marcello, Meyses, Naum, Nino, Organtino, Ottavio, Paraclito, Philippus, Princivalle, Roschinda, Sacerdotis, Salomon, Santo, Sayrus, Scipione, Sigismondo, Sim., Stefano, Teofilo, Tomaso. 

17^th Century  

Francesco /Ciccio/ Cicco/Franceschiello - 13

Giovanni/ Giovan Maria /Giovan Domenico/ Giovan Ambrosio /Giov. Battista -10

Antonio/ Antonius/ Antonello, Gerolamo /Gerolimo /Geronimo -5

Domenico/ Dominico/ Minico, Ottavio /Ottaviano,  Paolo -3

Alonzo, Luca, Nicola/Cola -2 

Names occurring once:

Alfonso, Ambrosio, Aniballe, Asciano, Aurelio Carlo, Cesare, Cosimo, Donno Marcello, Federico, Filippo, Giorgio, Jacomo, Landus, Lattanzio, Lelio, Michele, Natale, Paride, Pietro, Rocco, Salvator, Santonio, Scipione, Tomaso, Violante, Vincenzo. 

* The names Constans and Constantinos are probably two different names from the same root  which could have been confused in medieval period. It is possible that something resembling the Constans form got used as a short-form of  the  Constantinos  forms.