Melita Ruhn (later Fleischer) is a retired Romanian artistic gymnast who represented Romania at the 1980 Summer Olympics. She belongs to the German minority in Romania. She won three Olympic medals (team, vault, uneven bars) for Romania and scored a perfect ten for the vault optionals in the team competition of the 1980 Olympic Games. In 1979 she was a member of the first world gold medal-winning team of Romania. She is also an all around and floor world bronze medalist.
Princess Marie Melita of Hohenlohe-Langenburg was the daughter of Princess Alexandra of Saxe-Coburg and Gotha. She shared the same middle name as her maternal aunt who was born as Princess Victoria Melita of Saxe-Coburg and Gotha.
In Eastern Europe, this is most likely a variant of Melitta, a variant of Melissa. (Although in the case of Princess Victoria Melita, it was indeed derived from Malta, which was her birthplace.)