Not all surnames similar to the surname Ngamsaeng are related to it. Sometimes it is possible to find surnames similar to Ngamsaeng 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 Ngamsaeng may have undergone changes or modifications, and from those modifications, surnames similar to Ngamsaeng may have appeared, as we can see.