Freyr and his sister Freya were gods of "fertility", which means being able to grow. They made sure that people had many children and that the land produced plenty of crops. Some farmers even called their fields after Freyr, in the hope that this would ensure a good harvest. Toward the end of the Viking Age, more and more Scandinavians were converted to Christianity, often by force. The introduction of Christianity did not immediately end Viking voyages, but it may have been a factor that helped the Viking Age to an end.