Dolly Parton has been quoted in many interviews as saying she never gave birth to any children but she helped raise her younger siblings. She is also well-known for her charity work that benefits children.
Dolly the Sheep was named after Dolly Parton because the cell that was taken from the sheep to clone Dolly the sheep was a mamary gland cell, since Dolly Parton is known for her boobs Dolly was the natural choice.
Yoda is a fictional character and Dolly Parton is a real person so they are not really comparable. However I would say that in the younger generation many more people know who Yoda is and not many know Dolly Parton.