Short answers, pulled from the story.
Alexandre Florian Joseph Colonna Walewski drew his first breath on the 4th of May 1810 at Walewice near Warsaw. His mother Countess Maria Walewska gave birth there after Napoleon insisted she return to her husband's estate in Poland.
Published scholarship from 2013 compared DNA haplotype evidence from Emperor Napoleon with that of his brother King Jérôme Bonaparte's descendant Charles Prince Napoléon. The study examined DNA from Colonna-Walewski's descendants and indicated his membership in the imperial House of Bonaparte male-line.
Napoleon officially decreed Alexandre a Count of the French Empire on the 5th of May 1812. He later signed letters patent confirming this title on June 15 while in Königsberg.
In 1856 Alexandre Colonna-Walewski presided over the Congress of Paris where delegates negotiated terms ending the war. As Minister of Foreign Affairs he acted as President of French plenipotentiary leading to peace and the creation of international law regarding neutral rights at sea.
Alexandre Colonna-Walewski married Lady Catherine Montagu in London on the 1st of December 1831 and Maria Anna di Ricci in Florence on the 4th of June 1846. He had seven children total including two from his first marriage four from his second marriage and one illegitimate child recognized later.