How many movies are about Helen Keller?

At least 8 movies are known to be about Helen Keller:

1. The Miracle Worker (1962)

2. The Miracle Worker (2000)

3. Helen Keller: The Miracle Continues (1984)

4. Helen Keller: A Light for Others (1989)

5. Helen of the North (2011)

6. The World of Helen Keller (1929)

7. Helen Keller in Scotland (1952)

8. The Many Loves of Helen Keller (2014)