Aaaaaaaahhh... now we are getting to the nub of the question!
I have looked in the Tilburg phone book - just down the road from me here in Eindhoven - and there are at least 30 Pigmans.
It sounds very much more like a Flemish name than a French one. I shall do a search in the Dutch databases. One wave of Huguenots came from the French-Belgian border and were put to work draining the Fens because of their experience in low-lying Flanders/Holland.
I will keep in touch via e-mail,
Best wishes, David