> But it's significantly more common as a last name than any of the other greek letters. Mu (https://forebears.io/surnames?q=mu https://forebears.io/surnames?q

> But it's significantly more common as a last name than any of the other greek letters. Mu (https://forebears.io/surnames?q=mu https://forebears.io/surnames?q=mu) is more common than Xi (https://forebears.io/surnames?q=xi https://forebears.io/surnames?q=xi).