What was the name of the official cat aboard RMS "Titanic"?

Jenny was the mascot and handler of mice aboard the Titanic.

The Titanic also had several dogs on the ship that were brought on by the passengers. while the dogs were supposed to stay in the kennels several of the 1st class passengers kept their dogs in their rooms. Three dogs actually survived on the life boats, but none of the other animals were as lucky.

https://en.wikipedia.org/wiki/Animals_aboard_the_Titanic#:~:text=3%20Notes-,Inventory,before%20Titanic%20sailed%20from%20Southampton.

Jenny was a ship cat, meaning she was allowed to roam the decks freely and help keep the rat population under control. With no one to smuggle her into a lifeboat-as was the case with two lucky Pomeranians and one Pekingese on board-Jenny's story likely didn't have a happy ending. The cat never turned up after the ship sank into the Atlantic, and she was presumed dead.

https://www.mentalfloss.com/posts/jenny-titanic-cat