- This is about the American manufacturer. For others, see Donald Duncan (disambiguation).
Donald Franklin Duncan Sr. | |
|---|---|
 | |
| Born | June 6, 1892 |
| Died | May 15, 1971 (aged 78) |
| Nationality | American |
| Known for | Marketing of the Yo-yo and making it a commercial success |
Donald Franklin Duncan Sr. (June 6, 1892 – May 15, 1971) was an American entrepreneur and inventor, and founder of the Duncan Toys Company. He is known for marketing of the Yo-yo, and making it a commercial success.