Rennie

Rennie is a name with a somewhat complex etymology, primarily rooted in Scottish and Irish Gaelic traditions. It can be a diminutive of names like Renwick or a surname derived from a place name or a personal characteristic. In Scotland, it often functions as a surname, possibly from a place called Rennie or from a diminutive of the personal name Reynold. As a given name, it has seen use for both boys and girls, often as a nickname that eventually became a standalone name.

The 'small but mighty' meaning is a popular interpretation, reflecting the name's concise sound and potential association with resilience. Its usage as a given name is less common than its surname form, contributing to its unique and distinctive feel. The name carries a subtle charm, often associated with its Celtic heritage.