Going to google, typing swann rebranded dahua, i get this in the first link...
Companies That Rebrand/Resell:
Swann (Rebrands Hikvision Equipment)
Lorex (Rebrands Hikvision Equipment)
Q-See (Rebrands Dahua Equipment)
Toshiba (Appears To Rebrand Vivotek)
Cisco (Sometimes Rebrands Pelco)
You...