A computing language [L1 ] in the ancestry of nearly all others, but with little discernable direct relation to Tcl.
Algol has
Algol does not have
Algol is not in the ancestry of Fortran (at least the early versions), LISP, or Cobol.
But Algol is in the ancestry of C, and the list of things above that Algol "has" is a strong subset of the things that make C what it is. So I think the relation to Tcl is discernable after all.