Some, but not all of my machines, have names.
My Janome 6500P is usually referred to a s "Big Girl", mostly because I had a smaller Janome that I referred to as "Little Girl"
My Janome 744D overlocker, that has a twisted frame, and vibrates itself and other machines off the desk, is known as Moira. That is my mothers name, and is because the machine is an anti-social old cow, who alienates everyone around her. She's also very loud.
My other modern machines haven't earned names yet, and my dress form is too new to know what her name is.
One of my treadles is known as "The Great Pretender", as its a modern treadle that I was duped into thinking was a vintage.