Helen Tradusa "Helenka" Adamowska Pantaleoni (November 22, 1900 – January 5, 1987) was an American silent film actress and humanitarian.

Pantaleoni was the daughter of Polish musicians Józef (July 4, 1862 – May 8, 1930) and Antonina (née Szumowska) Adamowska (February 22, 1868, Lublin, Poland – August 16, 1938, Rumson, New Jersey).

After studying piano in Poland Antonina became the only known female pupil of Ignacy Jan Paderewski in Paris between 1890 and 1895, when she left for the United States.

After touring Europe and the United States her parents settled in Brookline, Massachusetts, where Helenka was born.

As a Lieutenant Colonel attached to the Office of Strategic Services he was killed in action in Sicily in August 1943, leaving Helenka with five children to raise.

The Executive Director of UNICEF, James P. Grant, wrote in 1994:For 26 years, from 1953 through 1978, she served as volunteer president of the U.S. Committee.

While she headed the Committee more than $113 million was turned over to UNICEF in the name of the American people ...[18]Helenka's uncle Tymoteusz (aka Timothee) was the first conductor of the Boston Pops Orchestra.