[sampo]

Lindenmayer (born 1925) and Prusinkiewicz (born 1952) are older.

https://en.wikipedia.org/wiki/Aristid_Lindenmayer

https://en.wikipedia.org/wiki/Przemys%C5%82aw_Prusinkiewicz

https://en.wikipedia.org/wiki/The_Algorithmic_Beauty_of_Plan...