Born Lawrence Reyner in Ripon, Yorkshire, he made his profession as a Benedictine monk in the monastery of St. Laurence at Dieulouard in Lorraine in 1610 taking the name in religion "Clement".
)[1] Subsequently, Reyner the younger was sent on the English mission, and was imprisoned in Yorkshire, as a Catholic priest, on 1 April 1618.
the arrival of troops of the Protestant Gustavus Adolphus caused Reyner and his small community of monks to escape across the Weser river in mid-winter.
[3] The monks of monastery of St. Peter at Ghent requested an English Benedictine to suggest improvements in practice, Reyner was sent to introduce some reforms.
[2] Reyner was editor of the historical work Apostolatus Benedictinorum in Anglia, sive Disceptatio Historica de Antiquitate Ordinis Congregationisque Monachorum Nigrorum S. Benedicti in regno Angliæ, Douay, 1626.