Cadie / Catherine / Katherine / Caitlin

Cadie is a name with multiple potential origins, making its history somewhat complex. It can be a diminutive or pet form of 'Catherine' (from Greek 'Aikaterine', meaning 'pure'). In this context, its usage would trace back to the popularity of Saint Catherine. Alternatively, it may derive from the Irish surname 'Mac Cadáin', meaning 'son of Cadán', where Cadán itself is of uncertain meaning but possibly related to 'battle' or 'spirit'. In Scotland, it could be a variant of 'Cady', a diminutive of 'Catherine' or a local name.

Its modern usage often sees it as a contemporary given name, sometimes chosen for its pleasant sound rather than a direct etymological link. The name has gained some traction in English-speaking countries as a less common alternative to names like Katie or Kady, blending traditional roots with a modern feel.