Eirak
From Tardis Wiki, the free Doctor Who reference
Eirak was the leader of the Vanir on Terminus.
Biography
When Valgard challenged his leadership, Eirak agreed to step down if Valgard would bring the Fifth Doctor back from the Forbidden Zone. He feventually did. The Vanir were freed when Nyssa offered to synthesise Hydromel for them. (TV: Terminus)