  The possibility of observing CP violation in the decays of Higgs particles
into top-quark, W- and Z-boson pairs induced by heavy Majorana neutrinos is
discussed. In the context of minimal "see-saw" models with interfamily mixings,
we find that Majorana neutrinos may give rise to sizable CP-odd effects at the
one-loop electroweak order. We present numerical estimates of typical CP-odd
observables that might be triggered at high-energy e+e- colliders.
