Please call me Richard.
I fear that my command of the English language is not up to the task of conveying my central message.If I have you right, Annetje was definitely born into a family using the spelling "Lawson" because that was her father's name. But, it does not matter how her father spelled his name.
The article that Doug Van Curen had pointed you and other interested researchers to regarding the pre-Canadian Lawsons is entitled "Pieter Pieterse Lassen of Dutchess County and His Descendants," by Donna G. Ewins. It appeared serially in the New York Genealogical & Biographical quarterly, The Record, commencing with Volume 129, No. 3 (July 1998) and continuing into Volume 131, No. 1 (January 2001). Ms. Ewins provides her mailing address in the article and invites "Anyone with additional information on this family...to contact the author." The address is: 8521 Porter Road, Apt. 51, Niagra Falls, NY 14304-1626.You might consider contacting her directly concerning your branch of this family.
It is a massive article, 10-14 pages per installment; the editors of The Record note that, "Donna Ewins has done a masterful job of sorting out the early generations of this large family, a task which has discouraged many others particularly because of the repetition of given names." [Harry Macy, Jr. FASG, FGBS, Editor, and Henry B. Hoff, CG, FASG, FGBS, Consulting Editor].
As I have already mentioned in my first reply to yours of 8 September, Ms. Ewins' first sentence reads, "Anyone conducting research in the 18th century civil and ecclesiastical records of colonial Dutchess County, New York, will quickly find references to a whole host of individuals named Lassen and Lassing, with these surnames evolving into Lawson and Lossing by 1800."
In your message you mention the church records:
"Shall I say a "neat item" contained in the Fishkill DRC 1801 church birth/baptismal record, perhaps unknown to you is this. Immediately above the parents Cornelius FV Sicklen and Hannah Lossing, there is recorded parents for another child (James Willis Jones) born Aug. 27 1801, thirty days prior to Sept 15 1801, the birth date of Maria to Hannah Lossing. As evidenced by the writing, the same recorder wrote both entries for both sets of parents. I will send as an attachment directly to yourself a copy of the Fishkill record if you desire but only if requested by yourself. The names of the parents for the James child are – Mathew P. Lossing and Margaret Lossing – no doubt 2nd or 3rd cousins. Such marriages were not an infrequent event before laws controlling interrelated marriages were in place. Perhaps Hannah Lossing was a sibling of either Mathew Lossing, or Margaret Lossing, or a more distance cousin. What relationship may have existed is not important. The significance of two additional Lossing names appearing thirty days earlier than Maria Lossing is self-evident proof of the following."
The family group is discussed at some length in Ms. Ewins' article at Record 130:3:294/295. When doing so, Ms. Ewins spells the names precisely as they appear in each record as transcribed by genealogists from the original registers (citations upon request). These two pages refer to the family of Pieter Lassing and Sarah Buys and includes the brothers John P., baptized as "Hans," and Matthew P., the man you speak about above, who was baptized as Matheus. Brother Hans, or John P., is the fellow who married the daughter of Cornelius Van Sicklen and Femmetje Vanderveer.
Referring to the entry for Matheus, or Matthew, Ms. Ewins provides:
"v. Matheus, b. 28 Mar., bap. 2 Trinity 1764, Zion Lutheran Church, Loonenburgh, sp. Matheus Brouwer and Cornelia Matters or Metters; d. after 1810, Brighton, Northumberland Co., Ontario, Canada; m. about 1790, Margaret Lawson, daughter of (#34) Johannes Lassing and Saartje ______, b. 8 Sept., bap. 24 October 1769, Reformed Dutch Church, New Hackensack, sp. Simeon Lassen and Margariet Lassen, his wife, died Brighton."
The author then supplies the names of this couple's children, the sixth of which is the James Willis Jones you mention above.
If you decide to write directly to Ms. Ewins, and I hope that you will, you might ask her about all these different surname spellings in the records she cites (I would not, however, suggest you accuse her of perpetrating a fraud–this would require a conspiracy between the author and Mssrs. Macy and Hoff, aided and abetted by Doug Van Curen, to deprive you of your rightful ancestry).