QML does not allow use of lower-case enum

#pragma once

#include <QObject>

struct MyEnums
{
    Q_GADGET
public:
    enum NumberEnum {
        Zero,
        One,
        Two,
        Three
    };
    Q_ENUM(NumberEnum)

    enum LetterEnum {
        aaa,
        bbb,
        ccc,
        ddd
    };
    Q_ENUM(LetterEnum)

    enum LetterEnum2 {
        Aaa,
        Bbb,
        Ccc,
        Ddd
    };
    Q_ENUM(LetterEnum2)

};

#include <QGuiApplication>
#include <QQuickView>

#include "enumfile.h"

int main(int argc, char** argv)
{
    QGuiApplication app(argc, argv);

    qmlRegisterUncreatableType<MyEnums>("MyLib", 1, 0, "MyEnums", "MyEnums can not be instantiated");

    QQuickView view;
    view.setSource(QUrl("main.qml"));
    view.show();

    return app.exec();
}

import QtQuick 2.3
import MyLib 1.0

Item
{
    width: 400
    height: 400

    QtObject {
        id: theObject
        property int enumValue: MyEnums.ccc
    }

    Text {
        anchors.centerIn: parent
        text: {
            return "Enum MyEnums.Two is " + MyEnums.Two +
                "\nEnum MyEnums.aaa is " + MyEnums.ccc +
                "\nEnum MyEnums.Ccc is " + MyEnums.Ccc +
                "\ntheObject.enumValue is " + theObject.enumValue
        }
    }
}

Enum MyEnums.Two is 2
Enum MyEnums.aaa is undefined
Enum MyEnums.Ccc is 2
theObject.enumValue is 2