  We perform a model-independent analysis of the possible residual Klein and
generalized CP symmetries associated with arbitrary lepton mixing angles in the
case that there are three light Majorana neutrino species. This approach
emphasizes the unique role of the Majorana phases and provides a useful
framework in which to discuss the origin of the Dirac CP phase in scenarios
with spontaneously broken flavor and generalized CP symmetries. The method is
shown to reproduce known examples in the literature based on tribimaximal and
bitrimaximal mixing patterns, and is used to investigate these issues for the
case of a particular (GR1) golden ratio mixing pattern.
