From what I can find Barbel, your actually using the name for a rune which is derived from the term “Ing” which is in Old English names is usually considered cognate to Yngvi. Yngvi is a name for the god Freyr.

Yngvi might be considered his “real” or true name while Freyr or “lord” is his common title.

In Heimkringla, Yngvi is a king of Sweden who was the son of Njord who succeeded Odin. Thus the start of the House of Ynglings comes from Yngvi.

How does this tie in to the Fraisi? Well there is the tribe called Ingaevones. Ingaevonic is often used by historical linguistics as a German proto-language for Frisian (and English).

BTW, the rune means “fertility” and referes back to Ingwaz (yet even another way of referring to the same god!) who consorted with Earth Mother.

I know this is winding back between german and norse, but its hard to pull those threads one at a time. Anyone with better information is welcomed to add to this discussion.