The origin of the name Slings (in the charters also spelled as Slinx, Slincks, Slincx, Slinckx, Slinkx, Slinks or Slinghs) is not quite clear. The medieval Dutch dictionary mentions two meanings. Both of them were already used in the 14th century. The first one is neutral: left; the second one has a negative meaning: wrong or cunning. The last one lives on in the Dutch expression slinkse streken (cunning tricks).
However, it's a fact that none of the estimated 25 generations which separate us from the Flemish Ave has taken the opportunity to get rid of this name. Here you can read their story...
This website is based on the running research of Gert Slings from Papendrecht/Lelystad en Hubert Slings from Waddinxveen (Holland). It has been last revised on Jan 19th, 2009 and it shows the best results in IE with a resolution of at least 800 x 600 pixels.