The last name "Goodenough" is of English origin. It is an occupational surname derived from the Middle English term "godenough," which means "good enough" or "satisfactory." The name likely originated as a nickname or a description for someone who was deemed competent, capable, or satisfactory in their profession or tasks.

In some cases, the surname may have also been a locational name, referring to someone who resided in a place called Goodenough or a similar variant. However, this is less common compared to the occupational origin.

Like many surnames, the spelling and pronunciation of "Goodenough" may have varied over time and across different regions. Variations of the name can be found, such as Goodenow or Goodenowes.

It's worth noting that surnames have complex and diverse origins, and multiple factors can contribute to the development of a particular surname. Different branches of a family may have different origins or variations of the name, so it's always recommended to research the specific family history to obtain more accurate information.