How would I detect a player's name and have it in a GUI?

So after typing this script, I tested it and realized I needed to add the player name to the script. How would I be able to detect the player name and have it above the rank I have implemented above the player's head.

groupid = 2830422

game.Players.PlayerAdded:connect(onPlayerRespawned)
function onPlayerRespawned(newPlayer)
    wait(1)
    if newPlayer:IsInGroup(groupid) then
        local gui = Instance.new("BillboardGui")
        gui.Parent=newPlayer.Character.Head
        gui.Adornee=newPlayer.Character.Head
        gui.Size=UDim2.new(2,0,.78,0)
        gui.StudsOffset=Vector3.new(0,2,0)
        local texta=Instance.new("TextBox")
        texta.Size=UDim2.new(1,0,1,0)
        texta.BackgroundTransparency = 1
        texta.BackgroundColor3 = Color3.new(0, 0, 0)
        texta.BorderColor3 = Color3.new(0, 0, 0)
        texta.TextColor3 = Color3.new(1, 1, 1)
        texta.BorderSizePixel = 1
        texta.TextScaled = false
        texta.TextStrokeTransparency = 1
        texta.FontSize = Enum.FontSize.Size18
        texta.Text = ("- " .. newPlayer:GetRoleInGroup(groupid) .. " -")
        texta.Parent=gui
        wait(5)
       if newPlayer:IsInGroup(1) then
        texta.TextColor3 = Color3.new(0, 0, 1)
        texta.Text = ("- MP/" .. newPlayer:GetRoleInGroup(groupid) .. " -")
        w = game.Lighting.WepsGroup:GetChildren() 
            for i = 1,#w do
            w[i]:Clone().Parent = newPlayer.Backpack
           end
        end
    end
end



function onPlayerEntered(newPlayer)
    newPlayer.Changed:connect(function (property)
        if (property == "Character") then
            onPlayerRespawned(newPlayer)
        end
    end)
end

game.Players.PlayerAdded:connect(onPlayerEntered)