According to someone at the Sheboygan County Historical Society I spoke with, Isaac's grave is flat to the ground as a result of a vandal or vandals in 1989, who pushed or kicked over several old graves in this cemetery as well as another one in Oostburg.

Most people named LeMahieu (or Le Mahieu) with a Wisconsin origination descend from this early Wisconsin pioneer named Isaac (aka Isaak), either via his first wife Elisabeth Buijk or his second wife Suzanne Morel.

Isaac's father Jacob LeMahieu was listed as a "Beach Worker" in a Dutch census taken in Cadzand, Zeeland, Netherlands. Isaac was the son of Jacob LeMahieu and Magdaleena Pieternella Orlebeke (not Isaak LeMahieu and Sara Caignet), according to online Dutch government records.

Isaac was widowed. His first wife, Elisabeth Buijk, died circa 1848. Isaac soon thereafter married Susan Morel in Sheboygan County, who was a widow also from Cadzand, Zeeland, NL who, like Isaac, had French Huguenot ancestry. Her ancestors can be traced back to Calais, France.

Both Isaac and Susan came to the U.S. on the ship Maria in 1847. Isaac's children via Elizabeth Buijk were also on the ship.

Susan's first husband was named Janniszoon Mabelis. Isaak and Susan both had children from their previous marriages and also produced five children together. For instance, Isaak had 8 children with Elizabeth Buijk, all of which came with him to the U.S., and 6 childen with Susan Morel, all of which were born in Wisconsin. Many, if not all, LeMahieus in Wisconsin or connected to it descend from Isaac as a result.

He had two sons named Martinus, one of which died at sea in infancy (son of Elizabeth Buijk). The second Martinus (Martin) lived into old age and is buried in Sheboygan Falls Cemetery with his wife Cena Smies.

After Isaac died, Susan married another Dutch settler named Barend Kleinhesselink, but had no children with him.

When Isaac A. LeMahieu was born in Cadzand, Zeeland, NL in 1797, the LeMahieu family had roots in that area going back at least 100 years. Before that, they were most likely Nord Pas-de-Calais or Lille area of France (Normandy), where Susan Morel's family was located in the late 1500s/early 1600s before her ancestors fled directly to Cadzand in the 1680s, according to Dr. De Hullu, editor of the Huguenot Society of London's documentation.

A useful link explaining some of the LeMahieu migration to Cadzand from Santes is here: http://patrimoinesantois.free.fr/page.php?id=65