J. Roelen, Bockhefte 1, 1938, S. 19 ff., 52
J. Roelen, Bockhefte 2, 1939, S. 10 f., 15, 40 f., 64
J. Roelen, Bockhefte 3, 1940, S. 22
A. Blömer, Ahnenliste Anna Gertrud Janssen (* um 1731/32 in Warden), Mönchengladbach 1984, S. 3
http://ahnenforschungen.de/quetting/index.php?m=family&id=I768
___________________ | Matthias SCHROIFF |___________________ | (1510-1591) Matthias SCHROIFF | ___________________ | (1554-1625)x1580 | | | | Lucia |___________________ | Heinrich SCHROIFF | | (1592-1675)x1617 | Görd NACKEN | | | (1470-1536)x1498 | | Gilles NACKEN | Katharina | | | (1510-1577) | | Maria NACKEN | ___________________ | (1555-1617)x1580 | | | | Maria |___________________ | (....-1579) |--Lucia SCHROIFF | (1631-1696)x1653 ___________________ | | | Johannes ESSER |___________________ | | x1560 | Ludwig ESSER | ___________________ | | (1560-1616)x1585 | | | | | N. |___________________ | | x1560 | Helena ESSER | ___________________ (1593-1673)x1617 | | | ____________________|___________________ | | | Maria WEYß | ___________________ (....-1616)x1585 | | |____________________|___________________