  In this paper we consider one parameter generalizations of some non -
symmetric divergence measures. Measures are \textit{relative information},
$\chi ^2 - $\textit{divergence}, \textit{relative J-divergence},
\textit{relative Jensen-Shannon divergence}and \textit{relative arithmetic and
geometric divergence}. All the generalizations considered can be written as
particular cases of Csisz\'{a}r \textit{f-divergence}. By conditioning the
probability distributions, relationships among the \textit{relative divergence
measures}are obtained.
