  We present a scheme to entangle two magnon modes in two macroscopic
yttrium-iron-garnet spheres. The two spheres are placed inside two microwave
cavities, which are driven by a two-mode squeezed microwave field. By using the
linear state-swap interaction between the cavity and the magnon mode in each
cavity, the quantum correlation of the two driving fields is with high
efficiency transferred to the two magnon modes. Considerable entanglement could
be achieved under experimentally achievable conditions $g \gg \kappa_a \gg
\kappa_m$, where $g$ is the cavity-magnon coupling rate and $\kappa_a$,
$\kappa_m$ are the decay rates of the cavity and magnon modes, respectively.
The entanglement is in the steady state and robust against temperature,
surviving up to hundreds of milliKelvin with experimentally accessible two-mode
squeezed source.
