Namesakes
Bishops of Rome and the Popes:
5 popes, 1 antipope
Nicholas I the Great (a.k.a. Nicolaus) 858-867 
Nicholas II (a.k.a. Nicolaus) 1058-1061
Nicholas III (a.k.a. Nicolaus) 1277-1280
Nicholas IV (a.k.a. Nicolaus) 1288-1292
Nicholas (a.k.a. Nicolaus) 1328-1330
Nicholas V (a.k.a. Nicolaus) 1447-1455
Notable Scientists and Inventors:
1 astronomer
Nicolaus Copernicus 1473-1543
Saints:
1 saint
Saint Nicholas (a.k.a. Nicolaus) 820-867