Mostly

Mostly the last name of the following people is

Andrew Mehrtens (* 1973), New Zealand rugby union player
Friedrich Adolf Mehrtens (1840–1899), German pianist, conductor and music teacher
Georg Christoph Mehrtens (1843–1917), German civil engineer and scientist
Hans Mehrtens (1892–1976), German architect
Herbert Mehrtens (* 1946), German science and mathematics historian
Jürgen Mehrtens (1912–2003), German lawyer and city director