Quenya 

manwendil

masculine name. *Friend of Manwë

Third child of Elros, known only from a genealogy chart on UT/210. His name seems to be a compound of Manwë and -(n)dil “-friend”.

Elements

WordGloss
Manwë“Blessed Being”
-(n)dil“-friend, -lover; devotion, disinterested love”

Manwë

blessed being

Manwë noun "Blessed Being" (Letters:283), the Elder King and Lord of the Valar, spouse of Varda. The name is adopted and adapted from Valarin Mānawenūz; names ending in - were already frequent in Quenya _(WJ:399). _In the Etymologies derived from MAN, WEG.Cf. Mánwen, Mánwë the oldest Quenya forms of Manwë, closer to the Valarin form (WJ:399). Lower-case manwë in LR:56. Ablative Manwello, VT49:24 (in this source Tolkien indicated that lo Manwë is the preferred way of saying "from Manwë", but this was apparently a short-lived idea; see lo). Masc. name Manwendil "Manwë-friend; one devoted to Manwë" (UT:210). In the pre-classical Tengwar system presupposed in the Etymologies, Manwë was also the name of letter #22 (VT45:32), which tengwa Tolkien would later call vala instead changing its Quenya value from m to v.