A Noldorin name for the Silmarils appearing in The Etymologies from the 1930s (Ety/MIR, ÑGOLOD; EtyAC/ÑGOL), a combination of mîr “jewel”, the plural form in of i “the” and the plural of Golodh “Gnome”.
Sindarin
Mîr in Geleidh
noun. Mîr in Geleidh
jewel of [the] Noldor; mîr (“jewel, precious thing”) + in (pl. genitive article) + Geleidh (pl. of (n-)Golodh “Noldor”) #In TA S would probably be Mîr in Gelydh.