Chattie, derived from the Scottish 'Chat' meaning 'cat,' is a unique and uncommon given name of Scottish origin. It is often used as a diminutive form of Catherine, but can stand alone as an independent name choice. Chattie was particularly popular in Scotland during the late 19th to early 20th centuries.
"Chattie was quite popular among parents from the late 19th to mid-20th century, with a notable peak in popularity between 1918 and 1922."