Caddyshack is based on Bill Murray's life growing up. Like Danny, he was a working class kid from a very large family (nine kids!!) who worked as a caddy when he was younger. I don't know if it's up on the web, but in his interview with Howard Stern from a year or two ago he talks about it. It was very surprising to hear, because like everyone else, I just thought the scene in the beginning was just "comedy", but no, it was a parody of Murray's childhood.
IMDB, flagging ppl for bull
since 1995.

But that wasnt his kid his wife said it was his nephew
Channel Six News, they'll finger anything with a pulse!

Oh FFS that was part of the joke.
They had so many kids that he did not know all of their names.
How can you not get that?

yeah but I dont think they were all their kids, cuz the dad asked his wife who the kid was he was siting across the table talking to
Channel Six News, they'll finger anything with a pulse!

That's cool. I had nothing else.

Thanks! I knew there was a joke or something behind that scene..
Suck it Thornspike. Your answer blows.

It was an inside joke from the writer Brian Doyle Murray. He came from a family with a lot of kids, including his brother Bill. They were Irish Catholic and didn't believe in birth control, so they just kept popping out kids.

Danny lived with a large family.