Bill: Name day
Name Day List: Bill
| Country | Day | Month | Names |
 Greece | 1 | January | Vasilis, Vasiliki, Koula, Basil, Bill, Tilemahos |
 USA | 25 | June | Bill, Billie, Billy, Guillermo, Liam, Mina, Minnie, Prosper, Velma, Vilma, Wilhelmina, Will, William, Willie, Willis, Wilma, Wilson |
Name Day List - similar names (Bill)
| Country | Day | Month | Names |
| USA | 18 | March | Cyril, Cyrilla, Grover, Salvador, Salvatore, Sibyl, Sybil, Sybilla |
 Poland | 29 | April | Angelina, Augustyn, Bogusław, Hugo, Hugon, Paulin, Piotr, Rita, Robert, Roberta, Sybilla |
 Latvia | 19 | May | Lita, Sibilla, Teika, Venda, Venta |
| Latvia | 20 | May | Prieca, Salvis, Sibilla, Venta |
 France | 3 | October | Gérard, Sybille |