Sindarin for the House (Clan) of Bëor (WJ/230). It is a combination of S. bâr “house, home” and the Edain name Bëor with the old genitive suffix -a “of”. Given the combination of elements, it may be from a different language than Sindarin, perhaps Nandorin or Bëorian.
Noldorin
beor
masculine name. Beor
beor
noun. follower, vassal
beor
noun. follower, vassal
bior
noun. follower, vassal
bôr
noun. steadfast, trusty man, faithful vassal
phonetic development fits Ossiriandic (PE19/25) @@@