In Basque mythology, Sugaar is the male half of a pre-Christian Basque deity associated with storms and thunder. He is normally imagined as a dragon or serpent. Unlike his female consort, Mari, there are very few remaining legends about Sugaar. The basic purpose of his existence is to periodically join with Mari in the mountains to generate the storms.
In one myth Sugaar seduces a Scottish princess in the village of Mundaka to father the mythical first Lord of Biscay, Jaun Zuria. This legend is believed to be a fabrication made to legitimize the Lordship of Biscay as a separate state from Navarre, because there is no historical account of such a lord. Only the fact that the delegates of Mundaka were attributed with the formal privilege of being the first to vote in the Biltzar (Parliament) of the province may look as unlikely indication of the partial veracity of this legend.