For those interested in the full story:
Theunis Janse Van AMACH / Van AMMAK, a Dutch Marine who came to America in 1673, during the war between the Netherlands and Great Britain. Theunis JANSE was a marine with the Dutch fleet that arrived in 1673 to reclaim New York. He was probably assigned to the 150-man contingency under Capt. Anthony COLVE. According to Theunis JANSE's marriage record in the NY Dutch Reform Church, he was from Denmark.
In 1521, King Christian II, who ruled Denmark from 1513-1523, appealed to the farmers in Holland / the Netherlands to come to Denmark and reclaim the marshes for farming, growing mostly vegetables. These farmers came from the province North-Holland around an island called "Marken". The Danish King offered the Dutch settlers a number of privileges, including land on the Isle of AMAGER, located just south of - and now a part of - the city of COPENHAGEN (This may help explain the connection between the Van AMAK & Van KOUWENHOVEN / COPENHAGEN / KOBENHAVN families of Flatlands, Kings Co. Long Island, New York). In return, the Dutch settlers were to "forsyne Kobenhavns slot med de fornodne rodder og log", in English: "provide the needed roots and onions for the castle in Copenhagen". Soon a Dutch trading post was located at Dragor, a village on the easternside of the island. King Christian II had also invited many Dutch ship-builders (today, the International Airport is located at AMAGER). The Isle of AMAGER and the village of Dragor became well known for its skilled seaman. These Dutch settlers maintained their language and traditions up until the beginning of the 19th century. The Isle of AMAGER was known by German seaman as AMAK.
It was then a very popular tradition among the Dutch people in New Netherlands - who had no surnames - to adopt the name of their place of origin as their surname. In English, the given name "Theunis" means "Antonius" or "Anthony"; "Janse" means "son of John"; "Van" means "of" or "from"; and "AMACH", "AMAK", or "AMMAK", was taken from the Isle of AMAGER, where Theunis JANSE was born. The name Theunis Janse Van AMAK translates as: "Anthony, son of John of AMAGER".
From "EARLY DUTCH SETTLERS OF MONMOUTH CO., N. J." by George C. Beekman, in a chapter entitled, "THE AUMACKS OR AUMOCKS OF MONMOUTH AND OCEAN COUNTIES.":
Teunis and Stephen Aumack were born at Flatlands, L. I.., and were the sons of Theunis Janse VanAmach, of that place. He is named among the citizens who took the oath of allegiance in 1687, and he is then put down as having been 14 years in America. The name is there spelled as VanAmach. I do not know how many children he had. The name was first spelled in Monmouth "Amak" and "Amack."
According to tradition Theunis Janse VanAmach was a marine on one of Admiral Cornelius Evertsen's or Jacob Binckes' ships, when they compelled the English to haul down their flag over New York in 1673. The red, white and blue of the Netherlands Republic waved over New York and New Jersey for about a year. VanAmach, then a young man, during this occupation, became attached to the daughter of a Dutch settler who lived in Brooklyn. Either his term of enlistment expired, or he was discharged, for when the fleet sailed away, he remained and became a resident of Flatlands, where he raised a family. He is therefore the progenitor of all the Aumacks and Aumocks in Monmouth and Ocean counties.
This family can therefore look back to one of the Dutchmen who wrested the New Netherlands from the English in 1673, and helped fight in the memorable war of that year, as their progenitor