What does ꟷ mean in Latin?

ꟷ, a letter, means “An epigraphic letter I used in inscriptions from Celtic Britain for the genitive of the second declension.”.

letter

ꟷ

letterAn epigraphic letter I used in inscriptions from Celtic Britain for the genitive of the second declension.
DERVACꟷ F͡ILIVS / IVSTꟷ (h)IC IACIT(The stone) of Dervacus, son of Justus. He lies here.c. 500 CE Stone inscription alongside a road
BODVOCꟷ HIC IACIT / F͡IL͡IVS CATOTIGIRNI / PRONEPVS ETERNAL͡I(s) / VEDOMAVꟷ(The stone) of Bodovoc. Here he lies, son of Catotigirnus (and) great-grandson of Eternalis Vedomavus.c. 800 CE Inscription on pillar stone

What does ꟷ mean in Latin?: ꟷ, a letter, means “An epigraphic letter I used in inscriptions from Celtic Britain for the genitive of the second declension.”.