The first Lem searching for the history of the Lem family was Rvd. Leon Lem. He was born in Brugge (Belgium) but lived in Rio de Janeiro (Brazil). He contacted a lot of Lem Lemm and Leme all over the world.
In the Netherlands he corresponded with Dr. Piet Lem in Nijmegen which started (ca. 1935) the research in the Netherlands.