[Galin]

The editors of Vinyar Tengwar 34 look at the possibility of a base GOTH- 'dread' being strengthened to *ñgoth and providing *-ñgotho 'dread one, foe' and that: 'ngotto in Moringotto appears to be this same element *ñgoth- with gemination of -th- to -tt-.'

In any case in the revised context I would say we are looking at archaic Quenya in Moriñgotho (which language contained -th- while later Quenya did not).