Datapoint Abkhaz/Are there special adnominal possessive pronouns that are not formed by an otherwise regular process?

Language or dialect:
Abkhaz
Feature:
Are there special adnominal possessive pronouns that are not formed by an otherwise regular process?
Coding:
present (Chirikba 2003: 33, 38)
Comment:
The standard process for possession involves prefixal marking on the possessum, e.g.: sə-š°q'°ə́ -- 1sing-book -- 'my book'. Alternates forms exist however whereby a coreferenced substantive -t'°ə is affixed to the short form of a personal pronoun, e.g.: wə-t'°ə́ -- 2sing-POSS -- 'yours (sing)'.