  We explore an intriguing possibility to test the type-II seesaw mechanism of
neutrino mass generation at the Large Hadron Collider (LHC). We show that the
lepton-number-violating signatures of heavy Majorana neutrinos N_i (for i=1, 2,
3) and doubly-charged Higgs bosons H^++(H^--) can be closely correlated with
each other in a class of TeV-scale type-II seesaw models. Taking the minimal
version of such models for example, we calculate the cross sections of pp ->
l^+_\alpha l^+_\beta X (l^-_\alpha l^-_\beta X) processes mediated separately
by N_1 and H^++(H^--), and illustrate their nontrivial correlation at the LHC.
