A monosyllabic IE *mneh2- is represented in classical Skt. a-mnasi?u/:t [3Pl.aor.] ‘they mentioned’… It is probable that this is a root extension of *men- ‘to remember’, but its function is unclear.
This passage establishes the Indo-European etymological root *mneh₂- underlying Greek mna- forms, linking Mnis to a proto-root for memory and mention shared with Sanskrit, while acknowledging unresolved questions about its functional extension.
, Etymological Dictionary of Greek, 2010thesis