Eustachius: Name day
Name Day List: Eustachius
Name Day List - similar names (Eustachius)
| Country | Day | Month | Names |
 Poland | 20 | February | Euchariusz, Eustachiusz, Eustachy, Leon, Ludmiła, Ludomiła, Ostap, Siestrzewit |
| Poland | 29 | March | Cyryl, Czcirad, Eustachiusz, Eustachy, Ostap, Wiktoryn |
| Poland | 16 | July | Andrzej, Benedykt, Dziersław, Dzierżysław, Eustachiusz, Eustachy, Faust, Maria Magdalena, Marika, Ostap, Ruta, Stefan |
| Poland | 20 | September | Dionizy, Eustachiusz, Eustachy, Fausta, Faustyna, Filipina, Irena, Oleg, Ostap, Sozant |
| Poland | 3 | October | Eustachiusz, Eustachy, Ewald, Gerard, Gerarda, Gerhard, Heliodor, Józefa, Kandyd, Sierosław, Teresa |
| Poland | 12 | October | Cyriak, Eustachiusz, Eustachy, Grzymisław, Maksymilian, Ostap, Salwin, Serafin, Witold, Witołd, Witolda |
Denmark