Is het mogelijk om 2 Tagnames in 1 option lijst element te krijgen?

<select name="laag" id="layer">
	<option selected="selected" hidden></option>
	<option value=""></option>
</select>


function myFunction(xml) {
	var x, i, xmlDoc, txt;
	xmlDoc = xml.responseXML;
	txt = "";
			
	//Leeg option lijst
		var a = document.getElementById("layer");
			while (a.length > 1) {
			a.remove(a.length-1);
			}
					
	//Plaats <title> in option lijst			
		var x = xmlDoc.getElementsByTagName("Title");			
		for (i = 0; i < x.length; i++) {
			var newoption = document.createElement("option");
			newoption.text = x[i].innerHTML;
			document.getElementById("layer").add(newoption);
				}

				var x = xmlDoc.getElementsByTagName("Name");
				for (i = 1; i < x.length; i++) {
					var newoption = document.createElement("option");
					newoption.value = x[i].innerHTML;
					a.add(newoption);
				 };
				var x2 = xmlDoc.getElementsByTagName("Title");
				for (i = 1; i < x2.length; i++) {
					var newoption1 = document.Element("option");
					newoption1.text = x2[i].innerHTML;
					a.add(newoption1);
				 };