In Chahar Mahal Bakhtiari Province of Iran there is a protected region called Helen region or Helen Mountain, which includes 40,000 hectares of mountain and oak forests. The region is named after an American nurse, Helen Jeffreys Bakhtiar, wife of Iranian Dr. Abol Ghassem Bakhtiar. Here is the story behind the naming:

Abol Ghassem Bakhtiar, M.D. was born in Borojen, Chahar Mahal Bakhtiari, in 1872. After studying English he went to America and became first Iranian to qualify as a physician in the United States and go back to Iran. He set up a private hospital in Tehran. Later he became Chief Surgeon for the AIOC in Masjid-i Sulayman, then he moved to Abadan where he had his private practice until he died in 1971. He had seventeen children from two wives, an American, Helen, and an Iranian, Bibi Turon Zargham. When Abol Ghasem was near death, he said that he wanted to be buried in Tus where Ferdowsi, Iranian epic poet is buried because he had a dream that his earth would mix with the earth of Ferdowsi and a Rostam would be born to save Iran.

Helen Jeffreys Bakhtiar was a Public Health Nurse. She met Abol Ghassem in New York when he was doing his residency. They were married in 1927 and moved to Iran in 1931. She helped Abol Ghasem setting up private practice in Tehran at the same time that she had seven children. She left Iran in 1939 at the beginning of World War II. She and Abol Ghassem were divorced in 1946. In 1950 she was hired by President Harry S. Truman's Point Four program to work as a public health nurse in the villages of Iran. She often visited Chahar Mahal and the Bakhtiari tribal people. She taught them public health and saved the lives of many women and children. In 1959 she took the migration with the tribe and delivered babies as they rode over the 14,000 foot high mountains to grass in Masjid-i Sulaiman and the Lali plain. She was much loved by the Bakhtiari people. They named a mountain after her in Chahar Mahal. Helen died two years after Abol Ghassem. She wanted to be buried next to him even though they had been divorced for over thirty years. She is buried in Tus, Khorasan Province, because she wanted to be part of Abol Ghassem's dream.
(The above description about Bakhtiars is prepared for me by their daughter, Dr. Laleh Bakhtiar which is much appreciated)