Namesakes
Bishops of Rome and the Popes:
1 pope
John XXIII (a.k.a. Roncalli) 1958-1963 
Notable Artists:
1 painter
Cristoforo Roncalli c. 1552-1626
Notable Musicians:
1 composer
Ludovico Roncalli 1654-1713
Saints:
1 saint
Saint John XXIII (a.k.a. Roncalli) 1881-1963