The central region of Númenor (UT/165). It may be a compound of mitta “between” and már “home”, with the “l” perhaps inserted to be euphonious.
Quenya
Mittalmar
midlands
mittalmar
place name. Inlands
Elements
Word Gloss mitta “between, [ᴹQ.] inwards, into, [ᴱQ.] in; [Q.] between” már “home, dwelling, habitation, home, dwelling, habitation; [ᴹQ.] house; earth”
Mittalmar noun the "Midlands" of Númenor (UT:165). May incorporate mitta- "between" and hence *"in the middle".