Son of Bór, an Easterling in Beleriand (S/157). His name is appears to be a combination of [N.] bôr “steadfast” and lach “flame” “flame” (as suggested by David Salo, GS/344). As this name was Sindarin, it was probably not his true name.

Conceptual Development: In Silmarillion drafts from the 1930s, this name first appeared as N. Boromir, changed to Borlach in Silmarillion revisions from the 1950s-60s (LR/134, WJ/240).

Earlier name of Borlach (LR/134). In The Etymologies, it was given as a derivative of ON. Boronmīro (Ety/BOR). The medial [m] developed from [mm] < [n+m], which is why it did not become [v]. This is a distinct etymology of the later name of S. Boromir of Gondor, where the medial [m] was explained by the fact that it was a mixture of Sindarin and Quenya elements.