Wikipedia:Wikifun/Answers/Task 5

Answer
After much searching, I'm still not 100% sure, but I'll venture a guess: your question refers to Mayonnaise. Our article says that it may have been named after the Battle of Arques in France (on September 21, 1589) between Henri IV and Charles of Lorraine, Duke of Mayenne in honor of the latter, "because he took the time to finish his meal of chicken with cold sauce before being defeated in battle by Henri IV". Lupo 08:36, 2 Nov 2004 (UTC)

Mayonnaise, Duke of Mahon in the 16th century