A verb appearing as har “stand” on the back of one version of Thror’s Map from the 1930s (AotH/56). It might be related to ᴹQ. thar- “stand” from 1948 (PE22/126).
Neo-Sindarin: Since the later Elvish root for “stand” is √TAR, I would update this verb to ᴺS. tar- as suggested by Elaran.
The form bronio in the Etymologies is a misreading according to VT/45:7