Statistiska centralbyrån and Sture Allén, Staffan Wåhlin, Förnamnsboken, Norstedts 1995, ISBN 9119551622: 37 232 males with the given name Olov (compared to 118 267 named Olof) living in Sweden on December 31st, 2010, with the frequency peak in the 1930s. Accessed on 19 June 2011.