A famous bearer of this name is Austrian actress Luise Rainer, who became the first to win the Oscar one year after another (she won it in 1936 and 1937).
Luise (1838-1923) was the only daughter of Emperor Wilhelm I of Germany and his wife Augusta. She was the younger sister of Emperor Friedrich III and sister-in-law of Victoria Adelaide, oldest daughter of Queen Victoria.
Luise (1720-1782) was also another daughter of King Frederick William I of Prussia and his wife Sophie. She was married to King Adolf Frederick of Sweden.