I see what you mean about the second consonants. However, the BtN definition for
Guido directs to
Wido. The etymology of
Wido is said to "witu" (wood) or "wit" (wide). Those elements had the same second consonant as wītaną.
That said though, it does appear that the Proto-Germanic root "widuz" evolved into Old High
German "witu", whereas the root "wītaną" evolved into the Old High
German "wīzzan". Where there are different second consonants in the Old High
German roots. Thank you for your help!
Is it significant in the disconnect of the two roots that Proto-Germanic is not the same thing as Old High
German?