Hey, my nickname is also NelleBelle!
I have a Viking Designer SE, who is called "Essie". I just got a Viking Sapphire 370, but haven't used her enough to know what her name should be. So far, I just call her the "370", but I am sure it will change once we get to know each other better.
On a humorous note--my oldest son and his wife have always named their cats, "Kitty". When their first child was born, they didn't have a name for her for a few days. We teased them, asking if they were going to name her "Baby". They didn't--her name is Kelsey Marie, who is a beautiful 5 year old girl now!