It comes from Mingrelian and apparently means something like "little relative," but I don't speak any Georgian, so I might be mistranslating it.
The entry I found was the third on page 139 here:
https://iverieli.nplg.gov.ge/bitstream/1234/533278/1/3000_Megruli_Gvar_Saxeli_2000_Tomi_I-II.pdf