  We theoretically investigate coherent oscillations of the thermopower
$\mathcal{S}$ as a function of the magnetic flux $\Phi$ in six-terminal Andreev
interferometers. We demonstrate that the thermopower behavior is determined by
a number of contributions originating from the Josephson-like and
Aharonov-Bohm-like effects as well as from electron-hole asymmetry. The
relative weight of these contributions depends on the relation between
temperature, voltage bias and an effective Thouless energy of our setup. We
particularly emphasize the role of the system topology that may have a dramatic
impact on the behavior of $\mathcal{S}(\Phi)$.
