In November 2008, there were 20,000 men named Erik in Norway (appr. 0.9% of the male pop.) and 13,000 named Eirik (0.8%). Source: Statistics Norway, http://www.ssb.no/navn/)
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Entries ÆiríkR, Æi- in Nordiskt runnamnslexikon (2002) by Lena Peterson at the Swedish Institute for Linguistics and Heritage (Institutet för språk och folkminnen).
Entries ÆiríkR, RíkR and -ríkR in Nordiskt runnamnslexikon (2002) by Lena Peterson at the Swedish Institute for Linguistics and Heritage (Institutet för språk och folkminnen).