According to wikipedia, Eiffel was created in 1986, making it a contemporary with C++'s initial development. From what I can tell, it's creator had no affiliation with the development of C/C++, and it was created for reasons completely unrelated to C++.
CppFront was created by the C++ committee chairman for the explicit goal of providing a path forward for C++. Herb explicitly stated that the inspiration for using C++ as a compilation target was taken from Bjarne's initial implementation of C++, which compiled to C.