Robert Crumplebottom

Robert Crumplebottom was a renowned philanthropist and puppeteer. He was first mentioned in The Sims: Hot Date.

History
Robert Crumplebottom was first mentioned in The Sims: Hot Date as a description for "Crumplebottom Park", a park made in memory of him. He then was mentioned again in The Sims: Vacation in the description of the Crumplebottom chandelier, which goes like this:

"This lamp is a remarkable recreation of a stage prop for the late, great Robert Crumplebottom. The original chandelier became famous when, during his annual winter charity performance, the lamp dropped a full two stories, landing upon the esteemed puppeteer and ending his short, but inspiring life. This replica is a testament to both his brilliance and his unfortunate end."

The Sims 2
It is revealed in The Sims 2 that Cornelia Goth's maiden name was "Crumplebottom", so it is clear that Robert Crumplebottom was somehow linked to the family. Other than this, Robert is not mentioned in The Sims 2.

The Sims 3
In The Sims 3, Robert's death makes Agnes an unhappy widow (this could be why she always wears black). By being married to Agnes, he is the brother-in-law of Gunther Goth as well as Cornelia Goth and the uncle of Mortimer Goth.

Though he is dead, he and his wife still have a relationship, as suggested by the pictures below. If you resurrect him (which is rumored to be possible by taking his urn to the science lab), Agnes will automatically become pregnant with twins as an Easter Egg.

It was somehow believed that a ghost named Erik Darling was Agnes' husband, but this is evidently not true. First,the ghost labeled as Eric Darling is not the same ghost Agnes is with in the cemetery in the other pictures. The faces are different, and they aren't even wearing the same clothing. Secondly, Agnes is clearly married to Robert because they share the same last name, and are shown as a premade couple in the 4th picture. But it is still unknown how Erik is related to Agnes, although his tombstone appears in Agnes' front yard, along with his ghost. It is possible that Erik was a relative of Robert or Agnes.

His last name was never Crumplebottom. If you have the Prima Tips guide, it states she never changed her last name because he died on their honeymoon.