The first American ancestor of the Flierboom and Vlierboom families was Mattys Flierboom, a Hollander, who emigrated to America somewhere about 1660 and settled at New Orange (Albany), where he became a man of note, rising to the dignities and honors of a judge of the courts at Albany. There he reared a family of five children: Caroline, Wellempie, Maritie, Servaes, and Jacob, and perhaps others. About 1692 the family removed to New Amsterdam, married Cornelius Jaus Haring. Maritie married in 1694 Rynier Reyserick. Servaes, in 1697, married Gertrude Lesting. Jacob married in 1699 Maritie Peters Haring. All these, except Servaes, became residents of Bergen County. Jacob, at the division of the Tappan patent, bought a large farm at what is now Rivervale, in Washington Township. He owned other lands there. His issue were Mary, Matthew, John, Abram, Ryner, Jannetie, James, and Jannetie. All of these except Matthew were baptized at Tappan. Jacob's children (a large family) located west of the Hackensack on lands bought of John McEvers, and their descendants are scattered over Bergen County, some having taken the name of "Freeborn."
Source: Genealogical History of Hudson and Bergen Counties, New Jersey, Editor, Cornelius Burnham Harvey, The New Jersey Genealogical Publishing Company, 1900, page 164.