The father-name of Maedhros, referring to the fact that he was third in the line of succession (PM/352). It is a combination of archaic †nelya “third” and the name of his grandfather Finwë. The short form of this name was Nelyo.
Quenya
Nelyafinwë
finwë third
nelyafinwë
masculine name. Finwë third
Maitimo
well-shaped one
Maitimo noun "well-shaped one", mother-name (never used in narrative) of Nelyafinwë = Maedhros (PM:353)
Nelyo
nelyo
Nelyo see Nelyafinwë
maitimo
masculine name. Well-shaped One
Nelyafinwë noun "Finwë third" (after the original Finwë and Curufinwë = Fëanor), masc. name; he was called Maedhros in Sindarin. Short Quenya name Nelyo. (PM:352)