First, you need to know who they are (names, dates, and places). Here's a link to their genealogy, so you can see who most of them are. A number of the lines in their tree aren't followed down, so either there were no children to an awful lot of marriages, or they aren't deemed important for some reason.

https://www.rothschildarchive.org/genealogy/

There's also the Wikipedia article. I haven't compared the two to see if there are any differences.

https://en.wikipedia.org/wiki/Genealogy_of_the_Rothschild_family

Here's a pedigree chart for them: https://upload.wikimedia.org/wikipedia/commons/5/53/Rothschild_family_tree.png

Here's an interesting article about an illegitimate daughter of a Rothschild, whose descendant built the castle used as the location for the British TV show "Downton Abbey." It contains some good genealogy details.

https://www.recordclick.com/family-history-researcher-visits-downton-abbeys-castle-virtually-gets-real-ancestors-story/

The second page of results to my Startpage search for "Rothschild genealogy" had an odd entry. It was an article on HuffPo saying that 1/4 of Hillary's family tree was traced incorrectly by almost everyone. Rothschild is not mentioned at all, but the search listed it. Perhaps Hillary is related to the Rothschild's by her correct grandmother, the other Hannah Jones born in the same place and around the same time as the incorrect one.

https://www.huffingtonpost.com/megan-smolenyak-smolenyak/hillary-clinton-family-tr_b_7009986.html

There's a ton of info out there. Just search.

https://www.huffingtonpost.com/megan-smolenyak-smolenyak/hillary-clinton-family-tr_b_7009986.html