Can anyone help me to find a polish aristocrat that married a Count DeCroix from France? They lived in Warsaw Poland in the mid 1800s. They had 2 girls called Josephine and Natalie.
They lived in a palatial estate and since I do not know the name of the woman, I was told that the Potocki family could know or have history of this.

I am a writer doing an autobiography about the daughter Josephine DeCroix. Her mother died very young, we have no record of her name other than the information I gave above.
Any leads or possible way to check this, would be wonderful.
Thanks so much.
God bless
Dale