JANNINCK, KONRAD. — Jesuit, Bollandist, born at Groningen on 16 November 1650, died at Antwerp on 13 August 1723. After serving for some time as assistant to Fathers G. Hensken and D. Papebroch (1679–81), he turned to the study of theology at the Roman College and took advantage of his stay in Rome to collect hagiographical material. Returning to the Bollandist College in 1681, he worked on the 12 volumes of the Acta SS. from volume V of May to volume II of July; but various journeys abroad and some spiritual ministries diverted him from more assiduous work.
He played a principal part in defending Father Papebroch, who had been attacked by the Carmelites over the question of the origin of their Order from St. Elijah (Acta SS. Aprilis, I, pp. 433–437), and during his journey to Rome to plead his cause, after the Acta SS. had been condemned by the Inquisitions of Toledo, Zaragoza, Madrid, and Valladolid, he succeeded in preventing more severe condemnations.
He wrote Pro Actis SS., hactenus editis, apologetica reposita antirreticis... p. Sebastiani a S. Paulo Provinciali Carmeli Flandrobelgici, in Acta SS. Iunii, I, pp. 1–XLIII.