Family name origins & meanings
- English : from a Middle English personal name, Alday, which is either a survival of an unrecorded Old English personal name Æ{dh}eldæg or from a cognate continental form, Aildag, imported to England from France by the Normans. The ultimate etymology in both cases is Germanic adal ‘noble’ + dag ‘day’.
- Americanized form of German Aldag.