Last year I submitted DNA kits to different companies for both myself, my brother and my son. Our Native American ancestry was confirmed through DNA which was like icing on the cake.
Here is a brief excerpt from Chapter 3 of my book The Van Slyke Family in America: A Genealogy of Cornelise Antonissen Van Slyke, 1604-1676 and his Mohawk Wife Ots-Toch, including the story of Jacques Hertel, 1603-1651, Father of Ots-Toch and Interpreter to Samuel de Champlain REVISED EDITION published May 2010.
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Caveat: Please take the use of the word "princess" with a grain of salt. It was common for 19th century writings to romanticize Native American women in particular, assigning daughter of a chief status to them. Ots-Toch was in fact fathered by Jacques Hertel, a French interpretor to Samuel de Champlain. It is not known who her Mohawk mother was.
Little is known of the wife of Cornelis Van Slyke. Even her name, Ots-Toch, is clouded in controversy, with some writing it as Alstock. One word in the Mohawk language which may provide a clue to her name is "Otsihsto" meaning "the stars". "Otsihsto" is pronounced so that the sound is similar to "Asistock". It must be remembered that her name was recorded phonetically from verbal accounts and it is quite possible that Otsihsto is the correct interpretation of Ots-Toch's name. Her date of birth is unknown, although it is estimated as circa 1622. There is argument over her heritage and her parents.There were many original records pertaining to Ots-Toch. As an example here is one given in my book as found in land records of 1713 for Harmen Van Slyke, grandson of Ots-Toch.
There are two prevalent theories of Ots-Toch's heritage, one that she was a full-blooded Mohawk of the Turtle Clan, the daughter of a Mohawk chief or Sachem.  The second theory is that Ots-Toch was the daughter of a French trapper, Jacques Hertel and a full-blooded Mohawk Princess.  The use of the word "Princess" would imply that Ots-Toch's mother was the daughter of the Sachem or chief of her tribe.According to Nelson Greene and other sources, Ots-Toch was "wild and savage like her mother".  Ouida Blanthorn, in her genealogy of Cornelis Van Slyck and his descendants written 1973, states that Ots-Toch was a "half-French, half-Indian maiden of compelling grace and beauty, whose mother was a Mohawk princess [sic] and whose father, Jacques Hartell [sic] was a French trader."
Harmen was a Captain in a Schenectady Company in 1714 and an Indian trader in 1724. He received a grant of 300 morgens of land at Canajoharie NY from the Mohawks because
"his grandmother was a right Mohawk woman" and "his father born with us at Canajoharie". His father was Jacques Cornelise, son of Ots-Toch, the half French, half Mohawk woman who married his father Cornelis Antonissen.
The deed conveyed 12 Jan. 1713 and consisting of 2000 acres, stated:
"in consideration of ye love, good will and affection which
we do bear toward our loving cozen and friend Capt. Harmon
Van Slyke of Schenectady, aforesaid, whose grandmother was a
right Mohawk squaw and his father born with us in the above
said Kanajoree [Canajoharie].......it being his the said
Harmen Van Slyke's by right of inheritance from his father"