Carl Gustaf Edvardsson Swan was noted Finnish teacher, journalist, and textbook publisher.
He had several noted children, including:
Saimi Pia Swan, who married Erik Nikolai Järnefelt, Finnish painter and art professor. He was brother to Aino Sibelius, the wife of the celebrated composer Jean Sibelius.
Anni Emilia Swan, who was a Finnish writer. Swan wrote many books for children and young adults, was a journalist for children's magazines and worked as a translator. She is considered the creator of Finnish literature for girls. She married Otto Manninen, who was a Finnish writer, poet, and a celebrated translator of world classics into Finnish language. Manninen translated the works of Homer, Sophocles, Euripides, Heine, Ibsen, Petőfi and Runeberg into Finnish.
Kaino Ihanelma Swan, a writer of children books, who married Christian Sibelius, who was a Finnish doctor and Professsor of Psychiatry. Like his elder brother, Jean Sibelius, he was a gifted chamber musician (a cellist), and he performed with him in his youth. Among their children was Riitta (Rita) Elisabet Sibelius, a noted neurologist, who married Gustaf Adolf Wangel, a neurologist. Among their children was Professor Emeritus Anders Gustaf Wangel, physician and professor. He met his wife Denise Norton after the 1952 Olympic games in Helsinki, where he sailed for Finland and she swam for Australia.