My uncle was Avent Hainaut. He immigrated with his family about 1914 to the US. I think they came from Lens, France.
His father was Voltaire and his mother Marie.

I have paged through 100 pages of Hainaut on World Connect and they seem to be mostly duplicates from 0900-1200. Can anyone connect with Hainauts from a later date?

If you search Hainaut on ancestry.com you should find some family trees. My grandfather was Lorrain Hainaut...I am currently working on my family tree.