Because the surname is so rare (both in the UK and in the Low Countries) I am almost certainly related to this guy:

https://en.wikipedia.org/wiki/Robert_Campin

I think of him as Umpty-Greats-Grandpa Bob. The pair of portraits in the National Gallery in London are wonderful. He also painted the most accurate depiction we have of a mediaeval mousetrap (somebody made a copy of it and it worked) and a machine-shop-precise picture of a bagpipe (played by a shepherd in a Nativity scene - an identical chanter turned up a few years ago, google for the "Rostock chanter").

You get the same woman as a model in several of his pictures, presumably his wife. Someone I pointed her out to said "your Nan looks absolutely legless" - posing for hours on end for the sort of minutely detailed, hyper-realistic work he did would have driven anybody to drink.

I'd rather have him as a relative than royalty.