Looking for information on Neeltje and Jacob Beekman who arrived at Ellis Island Dec. 18th, 1919 from Rotterdam, Holland.
Neeltje b. Feb 14, 1889 Rotterdam Holland d. Nov. 9, 1961 in Piscataway, New Jersey
Jacob Beekman b. March 5, 1889 Rotterdam Holland d. Aug. 4th, 1973, Piscataway, New Jersey
Neeltje and Jacob were cousins married in abt. 1908.
Children: Esther, b. abt. 1912 - Henduna, b. abt. 1914 - William, b. 1919 - Jacob, b. 1924

Relatives known living in Vlaardingen, Holland as late as 1951.
Family history says other family members came to US with Peter Stuyvesant. Would like to prove the link.
Any information would be helpful.