marionettemoduleshell.js

var myApp = new Backbone.Marionette.Application();

var childModuleName = 'MainModule';
myApp.module(childModuleName, MainModule);

function MainModule (module, parent, Backbone, Marionette, $, _) {
	var childModuleName = this.moduleName + '.foo';
	this.app.module(childModuleName, Foo, childModuleName);

	function Foo (module, parent, Backbone, Marionette, $, _, moduleName) {
		var childModuleName = moduleName + '.bar';
		this.app.module(childModuleName, Bar, childModuleName);

		function Bar (module, parent, Backbone, Marionette, $, _, moduleName) {
			console.log(moduleName); // prints Mainmodule.foo.bar
		}
	}
}

myApp.start();