Mc Kensy is an Irish-derived name meaning 'son of the fair-haired youth', originating from the ancient Gaelic given name "Mac an tSaoi". It has a long history, dating back to the 13th century when it was first recorded as borne by a clan inhabiting lands around Lochaber, Scotland. Despite its Scottish association, the Mc Kensy clan's origins are Irish, with ancestors migrating from County Antrim during the 12th-century Gaelic resurgence. Throughout history, the Mc Kensy clan played significant roles in Scottish politics and culture, known for their bravery as warriors against English forces. Today, Mc Kensy remains a surname predominantly found in Scotland and Ireland, but has also gained popularity as a given name for boys worldwide, while still being closely associated with Scottish culture and history.