- He was elected through the intervention of a representative of the emperor, Count Sicco, who drove out the intruded Franco (afterwards Pope Boniface VII.).
- JOHN XVII., whose original name was Sicco, succeeded Silvester II.
- He was ejected by Count Sicco, the representative of the emperor Otto II., and fled to Constantinople.
- Sicco, the name given to dry haematogen, is a tasteless powder.