Danskernes Navne, based on CPR data: 39 140 males with the given name Morten have been registered in Denmark between about 1890 (=the population alive in 1967) and January 2005, with the frequency peak in the 1970s. Accessed on May 9th, 2011.
Norwegian
Etymology
From DanishMorten, first recorded in Norway in the 15th century.
Kristoffer Kruken - Ola Stemshaug: Norsk personnamnleksikon, Det Norske Samlaget, Oslo 1995, →ISBN
Statistisk sentralbyrå, Namnestatistikk: 22 088 males with the given name Morten living in Norway on January 1st 2011, with the frequency peak in the 1970s. Accessed on April 29th, 2011.