Thyrsa Wealtheow Amos was the Dean of Women and Professor of Education at the University of Pittsburgh, Pennsylvania, United States, from 1919 to 1941. She was the founder and First President of the Pennsylvania Association of Deans of Women, the founder of the Society of Cwens, and the president of the National Association of Deans of Women (NADW). Her main area of interest was in student personnel, especially for women. She was also a member of the American Association of University Women.

Lambda Sigma (ΛΣ) is an American college honor society for second-year students. Originally named the Society of Cwens, the society was established at the University of Pittsburgh in Fall 1922 as a women's honors society and became a national organization with the 1925 foundation of chapters at Miami University and the University of Missouri. The society is "dedicated to the purpose of fostering leadership, scholarship, fellowship, and the spirit of service among college students, and to promoting the interests of the college or university in every possible way".