By the way, it is believed that Aoyama (in Minato Ward, Tokyo) is so called because the Edo residence of the ruler of the Gujo Domain was located there.
なお、東京都の青山(東京都港区)は、郡上藩の江戸屋敷がそこに存在した事から、そう呼ばれるようになったと言われる。