Isabella Rossellini (middle name Giovanna)
1952- 
(gold/silver/bronze) Giovanna Trillini
1992; 1996; 2000; 2004; 2008 fencing

Margherita of Savoy (middle name Giovanna)
1878-1900 Italy

Giovanna of Savoy
1907-1930; 1930-1943 Italy; Bulgaria

Blessed Giovanna of Signa
1244-1307 
Blessed Giovanna Soderini
1301-1367 
Blessed Giovanna of Orvieto
?-1306 
Blessed Giovanna Scopelli
1428-1491 
Blessed Giovanna Francesca Michelotti
1843-1888 
Blessed Maria Teresa Fasce (middle name Giovanna)
1881-1947 