It has been suggested that Haudh in Gwanûr means "mound of the brothers" in Sindarin, consisting of haudh ("mound, grave, tomb") + in (pl. genitive article) + gwanûr. In editions of The Lord of the Rings prior to the 2004 edition, the circumflex (^) was omitted.
Sindarin
Haudh in Gwanur
noun. mound of the brothers
Haudh in Gwanur
Haudh in Gwanûr
haudh (“mound, grave, tomb”), in (pl. genitive article), gwanur (pl. “brothers, kinsmen”)