Here's some info from Sims Wiki
If The Sims 3: Late Night is installed, he will also be a 1-star celebrity.
The reference to the mermaid in his bio, his household name "The Prince", and his being friends with Ariel Walsh but more interested Linda, imply that he is based on the Prince from the Little Mermaid story. In the original story, the Prince marries another leading to the mermaid's death, though how the Sim's story ends is of course up to the player.
Not sure where the little mermaid took place.
https://www.howtopronounce.com/rubisel
And here's how his name sounds at least his first name.