Emanuel Querido was a son of Aron Querido and Esther Lopes Dias. As a young man he learned the diamond trade, but in 1899 he set up business as an independent bookseller on Binnen-Amstel in Amsterdam. That same year he married Jane Kozijn. The couple had one son. Emanuel Querido started out as a small bookseller, but in 1915 he founded the publishing-house N.V. Em. Querido in Amsterdam.
In 1929 t…