loyally

from WordNet (r) 3.0 (2006)

loyally
    adv 1: with loyalty; in a loyal manner; "government will not be
           efficient unless the people as a whole accept leadership
           loyally and enthusiastically" [ant: {disloyally}]

from The Collaborative International Dictionary of English v.0.48

Loyally \Loy"al*ly\, adv.
   In a loyal manner; faithfully.
   [1913 Webster]