Rahmann Name Origin
The name Rahmann (spelled with two 'n's *) has Germanic origins, and can be either topographic or habitational. As a topographic name, Rahmann is a variant of Rademann - from the Low German Rade : 'area cleared of forest'.
Alternately, it can simply refer to someone from the town of Rade (of which there are several), or Rahm.
* when spelled Rahman (with a single 'n'), it is of Islamic origins; meaning 'most gracious'. This is usually forms part of a compound name such as al-Rahman ('the most gracious') or Abd ur-Ra'hman ('servant of the most gracious').