Andromeda XIX
The MegaPrime/MegaCam 1 deg2 (camera) on the Canada-France-Hawaii Telescope (CFHT) had mapped the M31 stellar halo (one quarter) up to ~150 kpc.  The observation, which had proved the uneveness of Andromeda's stellar halo, had shown that multiple other dwarf galaxies exist. They are: Andromeda XI, XII, XIII, XV, XVI, XVIII, XIX, and XX.