Baravorn
From Tolkien Gateway
Baravorn is the translation into Sindarin of the name Hamfast. The name appears in the King's Letter (see: Sauron Defeated, p. 121, 126, 129), sent by the King Elessar to master Samwise Gamgee in S.R. 1436.
The elements of the name are bar 'home' and avorn 'staying, fast'.