For the Lasdun family there are Stolpersteinen in Hamburg.
http://www.stolpersteine-hamburg.de/index.php?MAIN_ID=7&BIO_ID=2240
Addition
For the Lasdun family there are Stolpersteinen in Hamburg.
http://www.stolpersteine-hamburg.de/index.php?MAIN_ID=7&BIO_ID=2240