It is common to find surnames similar to Towy. This is because many times the surname Towy has undergone mutations.
Not all surnames similar to the surname Towy are related to it. Sometimes it is possible to find surnames similar to Towy that have a different origin and meaning.
Errors in writing, voluntary changes by the bearers, modifications for language reasons... There are many reasons why the surname Towy may have undergone changes or modifications, and from those modifications, surnames similar to Towy may have appeared, as we can see.