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)