Question: Who was Napoleon's illegitimate son by his mistress, Maria Walewska?
Sentence: Alexandre Colonna-Walewski (1810–1868), the son of his mistress Maria Walewska, although acknowledged by Walewska's husband, was also widely known to be his child, and the DNA of his direct male descendant has been used to help confirm Napoleon's Y-chromosome haplotype.
Answer in sentence: yes