Mackey is a name of Irish origin, derived from the Irish surname 'Mac Aodh,' which means 'son of fire.' It is a less common variant spelling of the name McKay, and shares similar historical roots. The name gained popularity in Ireland during the 19th century and has since become more widely recognized across the globe.
The name Mackey experienced its peak popularity during the late 1940s and early 1950s, with a particularly high number of births (24) recorded in 1950. However, overall, there has been a consistent decline in the usage of this name over time, as indicated by the decreasing birth rates from the mid-20th century onwards.