Not many would have predicted that, when The Santa Clause was released in 1994, Scott Calvin would still be entertaining viewers onscreen as Santa Claus nearly 30 years later — and that there would be so many more Calvins in the family. Released in 1994, The Santa Clause tells the story of Scott Calvin, a toy company executive and divorced father who is forced to become Santa Claus after causing the death of the old Santa. With multiple sequels and even a TV series, The Santa Clause's cast of characters has only gotten bigger since 1994.

https://screenrant.com/the-santa-clause-calvin-family-tree-explained/