Kerttu Shubert; Widow of Theater Chain Owner

Kerttu Helena Shubert, a former dancer and the widow of Shubert theater chain owner John Shubert, died Friday at a hospital in Greenwich, Conn., following a brief illness, the Shubert Organization said. She was 71.

Mrs. Shubert, who lived in Greenwich, was a member of the board of the Shubert Organization Inc. and a member and director of the Shubert Foundation Inc. She also was a member of the board of directors of the Museum of the City of New York Theatre Collection.

Her late husband, whose father and uncle founded the Shubert theaters, died in 1962 at the age of 53.

Mrs. Shubert is survived by a sister, Karina Adair of Dover, N.J., and a nephew, George Adair III of Whitingham, Vt.