Someone who had been born, and as a result named, in Radbourn in Warwickshire, or Radbourne in Derbyshire.
As mentioned, it seems to be a name of habitation, and both seem to have got their names from Old English: hreod for reeds and burna for stream. These would be consistent with the names mentioned earlier.
Rabon(e), Raburn, Rathborn(e), Rathbourn(e), Rathburn(e), Rathbond, Rathban(d)
All text is available under the terms of the GNU Free Documentation License. (See Copyright Policy for details.)