He was a Prince of Sweden from birth, but was excluded from the line of succession in 1934 when he married a woman of unequal rank, a violation of provisions prohibiting marriages between a Prince and a "private man's daughter" (enskild mans Dotter), in force at the time, contained in both the 1809 Instrument of Government and the 1810 Act of Succession, and, in addition, he lost his princely and ducal titles as decided by the King in Council.