Scandinavia converted from pagan to Christianity around 1000 AD Here are the kings oaths to serve God and their mottos. [Spirituality & Religion]

Here are the Swedish, Danish, and Norwegian Kings mottos

https://en.wikipedia.org/wiki/Royal_mottos_of_Swedish_monarchs

https://en.wikipedia.org/wiki/Royal_mottos_of_Danish_monarchs

https://en.wikipedia.org/wiki/List_of_Norwegian_monarchs'_mottos