ha, han, hana. (The distinctions between these forms are unclear. Possibly ha is the nominative, whereas han is the accusative. Hana could be an emphatic form. It may be that these pronouns as ”N” rather than Sindarin proper.)
Adûnaic
-a-
suffix. subjective inflection
The inflection used to put neuter nouns into the subjective case (SD/430), used either as a suffix (for weak-nouns) or augmenting the last vowel (for strong-nouns). See the entry on the subjective case for further details.