“I was brought by a woman named Roosevelt,” he continued. “Mrs. Claud Roosevelt. Do you know her? I met her somewhere last night.
The Roosevelt’s are a prominent American family — having produced two presidents (Teddy and Franklin Delano), and one first lady (Eleanor — she and Franklin were fifth cousins). Claud Roosevelt isn’t a real person, but it is very likely that Fitzgerald chose a name associated with famous American’s to make the party seem more sophisticated.
However, the other possibility is that Owl-Eyes picked an important name at random to try to fit in at Gatsby’s outlandish party.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter III)” by F. Scott Fitzgerald and leave a comment on the lyrics box