We are told the following regarding Yngve Frey: "After his death he was worshipped as a god. The day Friday is named in his honor. His wife's name was Gard."
We are told that Yngve Frey was buried at Uppsala in the tombe of the kings. A statue of him was erected at the Uppsala temple, along with the statues of Odin and Thor. The Swedish people gathered there three times a year to sacrifice to their gods and to hold their councils or "Things". At these events, the king heard the complaints of his subjects, consulted his wise men, and, together with his people, made important decisions for his kingdom.
The modern historian has difficulty in separating mist-shrouded legends from truth. Who knows? There may have been a real king named Yngve Frey, who was later worshipped as a god.
[Royal Families of Medieval Scandinavia, Flanders, and Kiev]