+———Johann David Gronow ( – 27 Jul 1631 Hamburg, Germany)          |      +———Johann Friedrich Gronow (5 Sep 1611 Hamburg, Germany – 28 Dec 1671 Leyden, Holland)      |   |                                                              |   |                                                   +———Ioannes Langmann (abt 980 Lucca, Tuscany – )      |   |                                                   |      |   |                                               +———Abt 6 Generation Langmann      |   |                                               |      |   |                                           +———Langmann (bef 1200 Nurnberg, Germany – )      |   |                                           |      |   |                                       +———Nurnberg Bürgermeister Langmann (abt 1200 Nürnberg – )      |   |                                       |      |   |                                   +———Otto Langmann (bet 1304 and 1313 – )      |   |                                   |      |   |                               +———Town Council Johann Hanss Langmann (bet 1349 and 1371 – bet 1369 and 1371)      |   |                               |   |          |   |                               |   +———Nun/Engelthal Mechtilde _____ (bet 1327 and 1338 – )      |   |                               |      |   |                           +———Mill Owner Conrad ’Cunz’ Langmann (bet 1313 and 1388 Reichenschwand, b/Nurnberg, Germany – )      |   |                           |      |   |                       +———Bernhard Langmann      |   |                       |      |   |                   +———Printer Cordt Langermann      |   |                   |      |   |               +———Merchant Berndt der Alte Langermann (bet 1491 and 1513 Munster, Westfalen, Germany – )      |   |               |      |   |           +———Merchant Bernhard Langermann (1485 Muenster, Westfalen, Germany – bef 21 Nov 1544 Hamburg, Germany)      |   |           |   |          |   |           |   +———Gertrud Calmenholt ( – bef 1497)      |   |           |      |   |       +———Rostock-Wittenbg Paul Langermann (abt bet 1532 and 1534 Hamburg, Germany – bet 1582 and 1585 Hamburg, Germany)      |   |       |   |          |   |       |   +———Margaretha Krantz (abt 1496 Hamburg – aft 1577)      |   |       |      |   |   +———Lorens Langermann (12 Nov 1556 Hamburg, Germany – 13 Aug 1620)      |   |   |   |          |   |   |   +———Margaretha Niebuhr ( – bef 1588 Hamburg, Germany)      |   |   |      |   +———Margaretha Langermann (9 May bet 1592 and 1594 Hamburg, Germany – 1655)      |       |          |       +———Anna Moilke (abt 1565 – 1598)      |  +———Geographer Jacob Gronow (20 Oct 1645 Deventer – 21 Oct 1716 Leyden, Holland)  |   |      |   +———Adelheid Tennulius ( – 1657)  |      Abraham Gronow