Agreed! Also compare Old High German
êwa meaning "time, age, law" and modern Dutch
eeuw meaning "century":
•
https://en.wiktionary.org/wiki/ewa#Old_High_German (in English)
•
https://en.wiktionary.org/wiki/eeuw#Dutch (in English)
By the way, AIVA can be found on page 49 of Ernst Förstemann's
Altdeutsches Namenbuch (1900):
•
https://archive.org/details/altdeutschesnam00seelgoog/page/n37/mode/2up (in German)
There might also be a chance that Evochildis is a theophoric name, in which case the first element refers to the obscure Flemish goddess Haeva (mentioned under Aeva by Förstemann on page 50). Much of what is now Flanders was once the territory of the Salian Franks. Since Evochildis was Queen of the Salian Franks, I would say that this theory is not that far-fetched.
According to the following source, the goddess' name might possibly be derived from (or otherwise related to) Germanic
*hiwan meaning "marriage":
•
https://godenvaneigenbodem.com/haeva/ (in Dutch)
Also compare modern Dutch
huwen meaning "to marry":
https://en.wiktionary.org/wiki/huwen#Dutch (in English)
Note that the aforementioned Dutch source states that Haeva was actually a goddess of the Batavi, a Germanic tribe that lived around the modern Dutch Rhine delta. However, the Salian Franks are also said to have lived around that general area.
• Batavi:
https://en.wikipedia.org/wiki/Batavi_(Germanic_tribe) (in English; "lived around the modern Dutch Rhine delta")
• Salian Franks:
https://en.wikipedia.org/wiki/Salian_Franks (in English; "living in the Rhine delta in the modern Netherlands")
Forchta in biuonga quamon ouer mi, in bethecoda mi thuisternussi.
In ic quad: "uuie sal geuan mi fetheron also duuon, in ic fliugon sal in raston sal?"