Sindarin 

aragost

masculine name. Aragost

The 8th chieftain of the Dúnedain (LotR/1038). The initial element of his name is the prefix ar(a)- “noble” and its final element might be [N.] gost “terror” (as suggested by David Salo, GS/341).

Conceptual Development: In the draft of Appendix A of the Lord of the Rings, his name was first given as Arandost, revised to Aragost (PM/211).

Sindarin [LotRI/Aragost; PMI/Aragost] Group: Eldamo. Published by

Aragost

noun. royal dread

aran (“king”) + gost (“dread”)

Sindarin [Tolkiendil] Group: Tolkiendil Compound Sindarin Names. Published by