There are a bunch of different OOP mainlines. Some have early Lisp influence, long before CLOS. Some are more or less completely without Lisp influence.

Simula, Object Pascal, C++, c#, ... (class based OOP with virtual functions)

Smalltalk (message passing, classes)

Lisp/CLOS (generic functions) -> Dylan, Perl, Julia, R, ...

Actors, Self, JavaScript, ... (Prototypes)

....