From Wiktionary, the free dictionary
From Old French ki, qui, whence French qui.
tchi
- who; which; that
2010, Mêfie-té des Monstres: Tchiques légendes dé Jèrri, Jersey: Le Don Balleine, L'Office du Jèrriais, →ISBN, page 10:Un mont tchi d'puthe dé sang- A mountain that streams with blood
- May be translated as who, which or that when relating to a person, or which or that when relating to a non-person
