Harry Nilsson's grandfather, Charles Harry Nilsson was born on September 11, 1894, in New York, New York.
On January 31, 1915, he married Catherine Beatrice Robb.
They had several children.
- Mona Nilsson born July 20, 1915.
- Harry Edward Nilsson, Jr. born on January 20, 1917.
- Beatrice Nilsson born in 1919.
- Melba Catherine Nilsson born April 13, 1923.
- Eileen Evelyn Nilsson born May 21, 1924.
Charles Harry Nilsson died in September of 1962.