  We report the discovery of six new magnetar counterpart candidates from deep
near-infrared Hubble Space Telescope imaging. The new candidates are among a
sample of nineteen magnetars for which we present HST data obtained between
2018-2020. We confirm the variability of previously established near-infrared
counterparts, and newly identify candidates for PSRJ1622-4950,
SwiftJ1822.3-1606, CXOUJ171405.7-381031, SwiftJ1833-0832, SwiftJ1834.9-0846 and
AXJ1818.8-1559 based on their proximity to X-ray localisations. The new
candidates are compared with the existing counterpart population in terms of
their colours, magnitudes, and near-infrared to X-ray spectral indices. We find
two candidates for AXJ1818.8-1559 which are both consistent with previously
established counterparts. The other new candidates are likely to be chance
alignments, or otherwise have a different origin for their near-infrared
emission not previously seen in magnetar counterparts. Further observations and
studies of these candidates are needed to firmly establish their nature.
