The initial name of the village was Přeboj. The Old Czech word přebojmeant 'robbery'. To make the name less unflattering and more understandable, it was changed to Předboj.
Geography
Předboj is located about north of Prague. It lies in an agricultural landscape in the Central Elbe Table. The highest point is at above sea level. The brook Kojetický potok flows through the municipality and supplies a system of several fishponds there.