Janssen origins
The Friesian language is a combination German and Dutch. Jan is a Dutch name. Ja: naming based on Deities. Jans Arms: 11th century Prussia. Schleswig - Holstein, Germany. A silver shield with 2 red bars.
Janssen sliver shield
Famous Janssen artists, economist, saints, inventor, astronomer and scientist.

Janssen Dutch genealogical databases

Frederik Willem Janssen (1892 - 1972) parents: Aloijsius Janssen and Johanna van Antwerpen, married 1917 Dordrecht Johanna Kuiters (1893 - 1972) parents: Willem Kuiters and Geertruida van Dongen.
Johanna Kuiters drawing sm
Johanna Kuiters, Janssen, Verheul iFamily web pages

Iowa, USA
Agatha Eggerke Janssen sm
Eggerke, Agatha Janssen (1845-1926), and Trientje Duin (1848-1942) descendants.

Limburg flag
Limburg flag
Gerardus Janssen and Mechtildis Rutjens c1725, from Oirlo, Li, NL.

Janssen English arms
Grietje Janssen and Bernard Maas from Ostfriesland, Germany (c1725).

Venray
Venray shield
Henric Janssen and Wilhelmina VanOeffelt 1732 .

Zuid-Holland 1925 Kinder postzegel
Dutch stamp 1925
Henricus Janssen and Beel Dijetiens 1620 Swalmen, ZH.

Raalte shield
Raalte shield
Jacob en Berent Janssen c1520 Overijssel, NL.

Overijssel postzegel
1925 stamp
Jacob Janssen (1800-1872) and Christina Maasen (1810-1898) Oosterhold, NL.

Meerlo flag
Meerlo flag
Joannes Janssen (c1690-1742) and Catharina Sijbers, Nederland.

Limburg 1925 stamp
Limburg stamp
Joannes Janssen (c1650-1719) and Helena Claasen (c1650-1731) from Stein, Limburg; Dutch data.

Wijlre crest
Wylre shield
Joannes (Jan) Jansen en Maria Cornips (1635-1702) van Elkenrade, Nederland.

Haelen shield
Halen arms
Jois / Joes Janssen (b1652, Haelen/Weert/Brunssum) and Anna ?

Brabant postage stamp
Brabant stamp
Lensvelt Gerrit Janssen (1600-1650) and Bastiaenke Wouters.

Gelderland province
Brabant stamp
Male Janssens married to various families. c1775 to 1910 Noord Brabant, Netherlands.

Mary Janssen (1715 - 1750) and Charles Calvert 5thLord of Baltimore (1699 - 1751)
Mary's ancestors fled Holland in 1572 when Baron de Heeze was hanged by Spain. Her father Theodore Janssen was a wealthy British corporate director and politician convicted of stock manipulation and insider trading.
Carles Calvert sm
iFamily report. Charles Calvert's ancestor is Charles II of England, his descendants include Martha Washington and General Lee.

Janssen new English shield
Janssen shield new English
Nicolas Janssen and Margarita Geurts c1815 from Herderen, Nederland.

Jans crest
Jans arms
Roelof Jans (c1630 - c1692), Harm Janssen Janssens (1759 - 1836) and Hillechien, Harms Noord (1758 - 1829).

Jansen crest
Jansen arms
Gerrit Janssen and Derkje Hoogestrijd c1811, Roetert Janssen and Gerriken ten Voorden c1680, Teunis Janssen and Geertien Reurick c1637, Wilhelmus Janssen and Godefrida Henderix c1710.

Erik Fleuren's site
tree
Theodorus (Dirck) Janssen den Holder, 1700, Oijen and Agnes van Bommel.