Columbia subject headings:
Harvard subject headings:
Gottfried, von Strassburg, active 13th century. Tristan.
Identity (Psychology) in literature.
Literature, Medieval--History and criticism
Poetry, Medieval--Themes, motives.
Wirnt, von Grafenberg, active 13th century. Wigalois.
Wolfram, von Eschenbach, active 12th century. Parzival.
Princeton subject headings:
Fathers and sons in literature.
Heroes in literature.
Identity (Psychology) in literature.
Literature, Medieval--History and criticism.