Last name Sigismundus (Sigismundus 
) , worldwide, is an extremely rare family name. Much more frequently, Sigismundus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sigismundus | United States |
Siegmund, Sigismond, Sigismund, Sigismundo, Sigmund, Zigmundas, Zikmund, Zsigmond, Zygmunt, Žiga, Žigmund, Жига, Жигмонд, Жигмунд, Зигизмунд, Зигмунд, Зигмундас, Зигмунт, Зикмунд, Зиґмунт, Зыгмунт, Сигизмунд, Сигмунд, Сигізмунд, Сігізмунд, זיגיסמונד, זיגמונד, זיגמונט, and سيغموند