Triinu

Triinu is an Estonian feminine name, functioning as a diminutive or pet form of Katariina, the Estonian equivalent of Katherine. The name Katherine ultimately derives from the Greek name Aikaterine, whose meaning is debated but is often associated with the Greek word katharos, meaning pure. Triinu developed as an affectionate short form within Estonian naming tradition, where such clipped and softened variants are commonly used as independent given names. Related forms include Katariina, Kati, and Riinu.