Altach(Natural Landmark)
to Barbing, district Regensburg; describes in REG 2 as an 'insula' (on the Danube)
Alteckendorf(France)
According to editor of WBG 133 and French Wikipedia, Eckendorf was absorbed into Alteckendorf in the C18.
Amiterno(Italy)
Old Roman city, disappeared in 10th century, whose settlement approximately coincides with San Vittorino, frazione of the comune of L'Aquila (located in less than 10 kilometres from city-centre).