+———Arthur STEVENSON (bef 1790 Ireland – )
              |
          +———Hans STEVENSON (1812 Ireland – aft 1871)
          |
      +———John Drennan STEVENSON (13 Feb 1835 Ireland – 15 Feb 1908)
      |   |    
      |   +———Elizabeth DRENNAN (1812 Ireland – aft 1871)
      |
  +———Hans STEVENSON (10 Oct 1861 Quebec, Canada – )
  |   |    
  |   +———Ann MAXWELL (1828 Ireland – 8 May 1904)
  |    
  Thomas Rockford STEVENSON (12 Jul 1892 Wisconsin, USA – )
  |    
  +———Ida ASLERE