Yes. I think there has been lots of confusion about which families were which. If the american clan that Martin belonged to was related to the european clan earlier I'm not sure about that. But the american Rothschild's made there fortune independent of the european branch. Martin R. made his own fortune. The Rothschild empire (european branch) today is valued around 400 billion according to Forbes. But I suspect its more than that. It's not so much what you own but what you control. Either way the Titanic's Rothschild's weren't suffering from lack of taco money. They did quite well.It already was by 1912. Rothschild branches in multiple European countries had received noble titles. But Martin and Elizabeth Rothschild were no relation to that family. A biography of Dorothy Parker that discusses the couple mentions that they enjoyed being mistaken for two of those Rothschilds. I don't know if this is true (some other details of them were got wrong in the bio), but if it is true, I assume it was more that they enjoyed thinking that people were making the assumption rather than perpetrated an active ruse.