I always thought it was really cool that Sarah Ida Shaw (Ida Shaw Martin after marriage) was the nation president of two NPC sororities. She was one of Tri Delta's founders and Tri Delta's first national president, and then for 16 years she was Alpha Sigma Alpha's national president as a sort of motherly figure/guide.
http://www.alphasigmaalpha.org/colle...ritage/history How very panhellenic of her
ETA: She also wrote the first 11 volumes of The Sorority Handbook.