Ortrud [1896] ｜ ｜ ｜―Obilot [1901] ｜ ｜―Oblate [1916] ｜ ｜―Ohne Sorge [1923] ｜ ｜ ｜―Osnova [1931] ｜ ｜―Odessa [1937] ｜ ｜ ｜―Odette [1942] ｜ ｜―Omladina [1938] ｜ ｜―Ottomane [1944] ｜ ｜―Oranien [1949]