  We identify a generic class of two dimensional nonstandard Hamiltonian
systems which exhibit isochronous behaviour. This class of systems belongs to
the two dimensional mixed Li\'enard- type equations and is obtained by
generalizing the scalar modified Emden equation (MEE) to two dimensions. We
show that the generalized class of equations admits a Hamiltonian description
and exhibits periodic and quasi-periodic oscillations for suitable choice of
parameters and also $\emph PT$ symmetric property.
