It is common to find surnames similar to Avadil. This is because many times the surname Avadil has undergone mutations.
The fact that there was no unified spelling for the surname Avadil when the first surnames were formed allows us to find many surnames similar to Avadil.
Discerning whether the surname Avadil or any of the surnames similar to Avadil came first is not always easy. There are many reasons that could have led to the surname Avadil being written or pronounced differently, giving rise to a new, different surname Avadil with a common root.