Custom Mob Name Help

demon:
  Mobtype: zombie
  Display: '&c&lPaladin'
  Disguise:
    Type: player
    Player: Paladin
    Skin: Bren
  Skills:
   - equip{i=demon_head:4} ~onSpawn
  Options:
    PreventRandomEquipment: true
    PreventOtherDrops: true
    Silent: true
    AlwaysShowName: true