Son of Kenneth; fire-born
A modern phonetic spelling of the Scottish surname Mackenzie. It is derived from the Gaelic Mac Coinnich, meaning 'son of Kenneth,' which itself stems from the name Cainnech, meaning 'fair one' or 'born of fire.'
Less common today
Mackensey isn't in the latest US Top 1000. It last peaked at #8,065 in 2001.
US births per 5-year period, 1990βpresent (SSA data).