Eske: Das große Vornamenlexikon (Duden) says: Fresian pet form, probably of names formed with Old Fresian "es", meaning "Ase (God)".
Svea is as Swedish as can be: The Svear people were one of the Germanic tribes in the early history of Sweden. "Sverige", the Swedish name of the country, means "Svear-rike" (realm of the Svear). The
Roman writer
Tacitus reports about the Svear in his book "Germania".
A Swedish professor of linguistics from the University of Uppsala told me: Svea probably means something like "of the own people, ourselves" (similar to the original meaning of "deutsch",
German).
In modern times Svea became a symbolic character representing Sweden as a whole. In 1670 the artist
David Klöcker Ehrenstahl painted "Moder Svea" to the ceiling of the Knights'
Hall in Stockholm.
There is a poem by
Esaias Tegnér called "Svea" (1811), calling upon Svea to help against the Russians, who had (once more) invaded the country. This time she couldn't help.
Hope this helps
Andy ;—)