David Jacob van Lennep was born in Amsterdam, as a member of the
Van Lennep Amsterdam patrician family. He was the son of Cornelis van Lennep (1751–1813) and Cornelia Henrietta van de Poll (1753–1827). Van Lennep attended a common nursery school, as his father advocated education without class differentiation. From his fifth to tenth year he attended the French school, and then the
Latin school in Amsterdam. At the latter he was a classmate of
Matthijs Siegenbeek, who later became the first university professor of Dutch language and rhetorics. In 1790 he enrolled at the Athenaeum Illustre where he read law and ancient Latin and Greek, writing a dissertation titled
De loco Ciceronis qui est de finibus bonorum in 1793. He then continued his studies in Leiden, as graduation was not possible in Amsterdam. In 1796 he obtained a doctoral degree in law and established his law practice in Amsterdam. In 1799 he succeeded
Daniël Wyttenbach at the Athenaeum Illustre in Amsterdam as professor of Greek, Latin, history, rhetoric, and antiquities. He later became an important advisor in Dutch politics. Van Lennep married Cornelia (Keetje) Christina van Orsoy on 30 September 1800 at the
Walloon Church in Amsterdam. The couple had a son,
Jacob, and a daughter, Anna Louisa (Antje). After Keetje's death in 1816 Van Lennep remarried in 1819. With Anna Catharina van de Poll (1791-1860) he had nine further children, three daughters and six sons. == Poetry ==