Sindarin 

erchirion

proper name. Erchirion

The 2nd son of Imrahil, appearing only in a genealogy chart of the house of Dol Amroth (PM/221). His name may be a combination of er “one”, a mutated form chir of hîr “lord” and the patronymic suffix -ion “son”, though David Salo suggested the initial element may be a variant form of the prefix ar(a)- “noble” (GS/348).

Elements

WordGloss
er“one, alone”
hîr“lord, master”
-ion“-son”
Sindarin [PMI/Erchirion] Group: Eldamo. Published by