This is half of a male given name. The language is Arabic. The original would have been something like Ashraful Din, "honour of the faith", or Ashraful Islam, "honour of Islam". Ashraf and ul (or al)are separate words in Arabic. This, if it is a surname, is unusual as it is usual for the second part of the name to be treated as a surname. In Pakistan this name might be written as Ashraf Uddin and Uddin would be treated as a surname. I'm not sure that these 'surnames' are hereditary, like European surnames. They are Islamic names of Arabic origin, but have taken forms that only people without a knowledge of the Arabic language would adopt.