Advent calendar day 8

Today I want the surname of a person who is the only from his or her country with a gold medal at the world orienteering championship. The person is representing an orienteering club with the same name as the star constellation which among others contains the stars Zeta, Epsilon and Delta. The club itself like to say they are “the brightest shining stars”, even though the brightest star in the constellation, Rigel, “only” is the seventh brightest star at the heaven seen from the earth.