'De Voluntate et Actionibus Dei circa Peccatum,' Amsterdam, 1657, which he submitted to the Dutch divines for their opinion. 'De Interpretatione et Perfectione Scripturae, una cum opusculis de Sabbato,' Rotterdam, 1663. Strang was three times married and had numerous children, many of whom died young. His daughter Helen married, first, one Wilkie; and, secondly, Robert Baillie in 1656. Strang's sister was the mother of John Blackadder, the Covenanting preacher.