Heinsius, Daniel an eminent scholar, was born in 1580 at Ghent. He studied law for some months at Franeker, but, determining to devote himself to letters, he went to Leyden, where he studied under Joseph Scaliger. In 1599 he began to teach Latin in the university, and on the death of Scaliger (1609) he was made professor of history. He was afterwards made librarian to the University, and historiographer to the States of Holland. He was secretary to the Synod of Dort, 1618. SEE DORT. He died Feb. 23, 1655. Besides editing many Latin and Greek classics, he published Sacrarum exercitationum ad N.T. libri 20 (Lugd. Bat. 1639, fol.): — Aristarchus sacer, sire Exercitatiozes ad Nonni Paraphrasin in Johannern (Lugd. Bat. 1627, sm. 8vo). Heinsius was a strong advocate of a special Hellenistic dialect.