Namesakes
Nobel Prize Winners:
1 economics
(economics) Guido Imbens 2021 
Notable Artists:
2 painters
Fra Angelico (a.k.a. Guido) c. 1395-1455
Guido Reni 1575-1642
Notable Musicians:
1 composer
Guido of Arezzo c. 991-c. 1035
Notable Politicians and Statespeople:
2 politicians
Guido Westerwelle 1961-2016
Guido Crosetto 1963-
Olympic Medalists:
1 silver
(silver) Guido Kratschmer 1976 decathlon
Other Leaders:
1 president
President Guido de Marco 1999-2004 Malta
Saints:
5 saints, 2 blessed
Saint Vitus (a.k.a. Guido) 290-303
Saint Guy (a.k.a. Guido) ?-940
Saint Guy of Anderlecht (a.k.a. Guido) 950-1012
Saint Guy of Pomposa (a.k.a. Guido) ?-1046
Blessed Guy Vignotelli (a.k.a. Guido) 1185-1245
Blessed Guido Maramaldi ?-1391
Saint Guido Maria Conforti 1865-1931