[ownedbycats]

I initially thought that Rockwell being present in all the versions was an error on my part, but it's also present in the dialog.py of 2.16.6:

KOBO_FONTS = {
            (0, 0 ,0): { # Format is: Display name, setting name
                 'Document Default':  'default', 
                 'Amasis':            'Amasis', 
                 'Avenir':            'Avenir Next', 
                 'Caecilia':          'Caecilia',
                 'Georgia':           'Georgia', 
                 'Gill Sans':         'Gill Sans', 
                 'Kobo Nickel':       'Kobo Nickel', 
                 'Malabar':           'Malabar', 
                 'Rockwell':          'Rockwell', 
                 'Gothic':            'A-OTF Gothic MB101 Pr6N', 
                 'Ryumin':            'A-OTF Ryumin Pr6N', 
                 'OpenDyslexic':      'OpenDyslexic', 
                 },
            (3, 19, 0): { # Format is: Display name, setting name
                 'Document Default':     'default', 
                 'Amasis':               'Amasis', 
                 'Avenir':               'Avenir Next', 
                 'Caecilia':             'Caecilia',
                 'Georgia':              'Georgia', 
                 'Gill Sans':            'Gill Sans', 
                 'Kobo Nickel':          'Kobo Nickel', 
                 'Malabar':              'Malabar', 
                 'Rockwell':             'Rockwell', 
                 'Kobo Tsukushi Mincho': 'KBJ-TsukuMin Pr6N RB', 
                 'Kobo UD Kakugo':       'KBJ-UDKakugo Pr6N M', 
                 'OpenDyslexic':         'OpenDyslexic', 
                 },
            (4, 13, 12638): { # Format is: Display name, setting name
                 'Document Default':     'default', 
                 'Amasis':               'Amasis', 
                 'Avenir':               'Avenir Next', 
                 'Caecilia':             'Caecilia',
                 'Georgia':              'Georgia', 
                 'Gill Sans':            'Gill Sans', 
                 'Kobo Nickel':          'Kobo Nickel', 
                 'Malabar':              'Malabar', 
                 'Rockwell':             'Rockwell', 
                 'AR UDJingxihei':       'AR UDJingxihei', 
                 'Kobo Tsukushi Mincho': 'KBJ-TsukuMin Pr6N RB', 
                 'Kobo UD Kakugo':       'KBJ-UDKakugo Pr6N M', 
                 'OpenDyslexic':         'OpenDyslexic', 
                 },
            }

I don't know davidfor made an error, or if there's a reason he left it. Does anybody have confirmation of what version Rockwell was removed, and if it was on all versions?