A term for the three Valar Osse, Orome and Tulkas from the day-name Ar Neleduir appearing in The Etymologies from the 1930s (Ety/LEP), a combination of neledh “three” and the lenited plural form of taur “king”.
Noldorin
neledh
cardinal. three
neledh
cardinal. three
neled
cardinal. three
neled
cardinal. three
neledh-
verb. to enter
neledh-
verb. *to go in, enter
neleduir
proper name. Three Kings
Hammond and Scull apparently understand this word as a derivative of neledh "three", hence their translation neledh neledhi "three by three". However, we have shown in Hiswelókë (third issue, pp. 74-78) that this word is conceivably a verb derived from LED "to go". The prefix ne- also occurs in nestegi "to insert, stick in"