Here's why:
* Meaning: The name likely derives from the Old English words "heort" (deer) and "linu" (linen), suggesting a connection to a person who worked with deer or linen.
* Distribution: The name is most common in the United States, with a smaller presence in Canada and the UK. This distribution points towards an English origin.
While it's possible for any name to be found in different countries and cultures, the evidence suggests Hartline is primarily an English surname.