No, the Vikings were not present before Christ.
The Viking Age is generally regarded as having started around the late 8th century, specifically in 793 AD, with the infamous raid on the Lindisfarne monastery in England. This time frame places the Vikings’ activities well after the birth of Christ, which is estimated to have occurred around 4 BC to 6 AD.
Vikings were seafaring Norse people primarily from the Scandinavian regions that included modern-day Denmark, Norway, and Sweden. They are known for their remarkable shipbuilding skills and their extensive explorations, trades, and raids across Europe and even reaching as far as North America by the 10th century.
Before the Viking Age, Scandinavia was inhabited by various Germanic tribes, but the distinctive cultural and historical identity associated with Vikings emerged much later. To summarize, while there were people in Scandinavia long before the Viking Age, the specific group known as Vikings did not exist before the birth of Christ.