Onion was named by Eliot. First he thought he should be named Shallow Chocolate. But that was too long. So then he thought he should be named a combination of the two words: Shoclate. That still seemed a bit much, so he changed it a little bit more, and his name was Shallot. When told that was the name of a kind of Onion, Eliot decided that Onion was really a cool name, so our male mouse has the name of Onion. When my mind is really not on Mousy Matters, I sometimes accidentally call him Olive. Don't ask me why, because I don't think Onion and Olive have much in common beyond being food items and starting with the letter O
I don't know all of Onion's genetics. One web site had a mouse which was considered to be a Mock Silver Agouti, due to a missing Cch
I will know more about Onion's genetics when Mavra and Sara have their litters.