✹ About Friday 29 November 1667 Deep Thought on 3 Dec 2020 • Link Have we discovered in the footnote to this entry the origin of 'Tibbles' as a pet name for a cat? ... 1. A male cat. “Gib” is a contraction of the Christian name Gilbert (Old French), “Tibert”). It's only two short hops from 'Gibert' to 'Tibert' to 'Tibbles'