The appearance of the 'Star Wars' character Yoda was partly modelled on which famous person?

Yoda is a fictional character in the Star Wars franchise created by George Lucas, first appearing in the 1980 film The Empire Strikes Back. In the original films, he trains Luke Skywalker to fight against the Galactic Empire. In the prequel films, he serves as the Grand Master of the Jedi Order and as a high-ranking general of Clone Troopers in the Clone Wars. Following his death in Return of the Jedi at an unknown age that surpassed 900 years.

The make-up artist Stuart Freeborn based Yoda's face partly on his own and partly on Albert Einstein's. In The Phantom Menace, he was redesigned to look younger. He was computer-generated for two distant shots, but remained mostly a puppet. The puppet was re-designed by Nick Dudman from Stuart Freeborn's original design.