Clang, yes, but llvm was started in 2000 at the University of Illinois at Urbana–Champaign, 7 years before clang (the c front-end) was open-sourced by Apple. Chris Lattner, one of the original LLVM people developed Clang at Apple, and Apple has been quite nice to llvm + clang =D
[0] http://lists.cs.uiuc.edu/pipermail/llvmdev/2007-July/009817....