Last name Макмиллен (Mcmillen 
, Макмиллен 
) , across the world, is a common family name. The family name Макмиллен is characteristic of the United States, where it is quite a rare surname, Canada, where it is a rare surname, and New Zealand. Not in comparison with a country's population, it is the most numerous in the United States, Canada, and the United Kingdom.