According to Wikipedia,
Prince Sébastien of Luxembourg is the fifth and youngest child of Henri, Grand Duke of Luxembourg, and Maria Teresa, Grand Duchess of Luxembourg. Prince Sébastien has four siblings Hereditary Grand Duke Guillaume, Prince Félix, Prince Louis, and Princess Alexandra. He is currently seventh in the line of succession, after his two oldest brothers and his sister and their children.
Prince Sébastien of Luxembourg is affiliated with the following schools: