Ngor Mei Sect in the Jin Yong universe is a Buddhist sect (though it's portrayed as Taoist in the works of other wuxia writers). Some of its members were nuns (Fung Ling See Tai; Mit Jeut See Tai), while others were laypersons (Chow Chi Yerk, Ding Mun Gwun, Gei Hiu Fu).
Among the leaders, Fung Ling and Mit Jeut were nuns who took on Buddhist names, but curiously, the sect founder Gwok Seung and fourth generation sect leader Chow Chi Yerk continued to use their lay names. The Ngor Mei Sect's policy on this matter seemed to be rather haphazard.