There was an early French explorer in Oklahoma, Bernard de la Harpe who explored here in 1719 and 1721.He was granted land above Natchitoches, north of the Red River in 1718 for the purpose of opening trade with the local Indians (AmerInds). Arriving, he set about exploring the land grant and making trading forays into the country side and exploring in eastern Oklahoma and western Arkansas.
I have seen references to the Harp(e) name in Ireland, and while the national symbol of Ireland may be the harp, Ireland may not be the origin of the the surname Harp(e) for one important reason.Shortly after arriving in England the Normans also landed in Ireland.Many adopted Irish ways and married into Irish families.Some took local names, while others differenciated their Normaness by adding the prefix Fitz to their names, still others just kept their surname the way it was.
Here is a good " for instance": My mother's maiden name was Wood and this name has changed many times over 1100 years.In the 1600's when they arrived in Plymouth, the Atwood's changed their surname to Wood, but Atwood was orinally Attwood, then Attwoode, then Atte Wode, once it was Wyckhurst (Anglicized in the 1100's) but at first it was du Bois, this does not mean it was French though as the Normans were Vikings who settled between 400 to 800 A.D. in a part of Gaul that became Normandy, so the Normans were Norse Men.My own first name is a reference to those early Danish Vikings who settled in Gaul, Doyle is of Gaelic origin and means "dark stranger", a reference to the Dane's whose hair was darker than the other Norse peoples of Norway, Finland and Sweden.
Now about those early census takers who spelled every name phonetically --- we can blame them for all these Barbry's, Eller's, Marthy's, and Meriday's (Meredith)we find in their reports.