Oliver is my only pet really named after anything. I named him after Oliver Twist. When I first brought him home, he was my smallest rat (now he's the biggest lol) and Tobias pretty much ruled the roost. Tobias would eat the food and Oliver would look at him with this look like "Please sir, can I have some more?" So I named him Oliver Twist. Oliver for short. Though his registered name will be Oliver Twist, once I get him registered.