The Simpson's dog was named Santa's Little Helper, and the cat was named Snowball (1, 2, 3, 4, etc)
The Simpsons family own a dog named Santa's Little Helper. They also own a cat called Snowball. Each time Snowball dies they get another one using the same name.
The same as they are today.
Season Five's Cape Feare
belle coco
The Simpsons currently have two pets, Snowball V (later renamed Snowball II) and Santa's little helper
Guy IncognitoMike RotchAmanda HugnkissMax PowerIvanna Tinkle
Santa's Little Helper is the name of the dog.
Nelson, Jimbo and, Kearney
The same as they are today.
Kirk, Luanne and Millhouse.
snowball1, snowball2 and snowball3
The two aliens on The Simpsons during Halloween are called Kang and Kodos.
Lisa, Bart and Maggie
His own family, except for Bart.
Season Five's Cape Feare
Honestly there are far too many to list them here and frankly their names you'd never know since The Simpsons is animated in Korea. Your best bet is to watch the credits to the end, freeze frame and read the names.
He has many pets. See the link below.
There is no evidence that Beethoven had any pets.