Jan Heer van Arkel & Princess Johanna of Julich 
Jan and Johanna were married on October 18th, 1376.1 They had a son and a daughter, named Willem and Maria.
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Personal Details
Jan Heer van Arkel
Jan was born in 1363 in Leerdam, Zuid-Holland, Netherlands.1 He died at the age of 65 on September 3rd, 1428 in Leerdam, Zuid-Holland, Netherlands.1
Princess Johanna of Julich
Johanna was born in 1368 in Julich, Rheinland, Prussia.1 She died in Leerdam, Zuid-Holland, Netherlands.1
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Children
Maria van Arkel
Maria was born in 1389 in Kleve, Rheinland, Prussia.1 She died at the age of 26 on July 19th, 1415.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I32528&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I32781
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I32781