I am looking for any information about my ggrandfather Harm Pinkster. I know he was born 5-15-1872 to Jan Pinkster and Tryntje Lenting in Nieuwolva, Groningen. He married Tiessien Bekkering on January 31, 1901 in Nieuwolva, Groningen, also. He owned and captained a large steel cargo ship called the Vertrowen. I know that he did this until at least 1911. I know he had a sister Frouke Pinkster who married Geert Bekkering, a brother named Edo Pinkster, and another brother named Albert Pinkster, all of the Netherlands. I believe he was also a twin to one of the brothers. He immigrated to the USA in 1911. Can anyone be of help?