Sid: Name day
Name Day List: Sid
| Country | Day | Month | Names |
 USA | 20 | February | Aimee, Alaric, Alarica, Alarice, Aimee, Ami, Amy, Amya, Cyd, Cydney, Desmond, Sid, Sidney, Sydnee, Sydney, Ulric |
Name Day List - similar names (Sid)
| Country | Day | Month | Names |
 Greece | 4 | February | Iasimos, Isidoros |
 Spain | 4 | February | Gilberto, Isidro, Verónica, Juana de Valois |
 Ukraine | 10 | March | Ann, Diodor, Hannah, Isidora |
 Austria | 4 | April | Isidor, Konrad |
 France | 4 | April | Isidore |
 Italy | 4 | April | Isidoro di Siviglia |
| Spain | 4 | April | Isidoro, Platón |
| Spain | 26 | April | Basilio, Marcelino, Engracia, Isidoro |
| Greece | 1 | May | Isidora, Tamara |
| Austria | 10 | May | Gordian, Isidor, Liliana |
| Greece | 14 | May | Aristotele, Isidoros |
| Spain | 15 | May | Cecilio, Eufrasia, Isidro, Torcuato, Indalecio |
 Denmark | 23 | May | Desiderius |
| Italy | 23 | May | Desiderio |
| Spain | 23 | May | Miguel, Mercurial, Eufebio, Humildad, Desiderio |
 Sweden | 23 | May | Desideria, Desirée |
| USA | 27 | May | Broderick, Brodie, Brody, Isador, Isadora, Isadore, Isidro |
 Croatia | 23 | June | Josip Caffasso, Sidonija, Zdenka |
 Slovakia | 23 | June | Sidónia |
 Latvia | 21 | August | Janina, Linda, Sidnejs |
| Spain | 21 | August | Sidonio |
| USA | 2 | September | Brock, Brook, Brooke, Brooklyn, Brooklynn, Brooks, Cassidy, Cassie, Castor, Kassidy, Kassie |
| Austria | 14 | November | Nikolaus, Sidonia |
| France | 14 | November | Sidoine |